OTP 29.0 Released
Erlang/OTP
otp@REDACTED
Wed May 13 10:52:58 CEST 2026
Inital Release: OTP 29.0
Git Tag: OTP-29.0
Date: 2026-05-13
Trouble Report Id: OTP-16607, OTP-19587, OTP-19611, OTP-19643,
OTP-19663, OTP-19672, OTP-19695, OTP-19708,
OTP-19709, OTP-19713, OTP-19734, OTP-19744,
OTP-19747, OTP-19750, OTP-19751, OTP-19763,
OTP-19766, OTP-19783, OTP-19784, OTP-19785,
OTP-19786, OTP-19793, OTP-19800, OTP-19801,
OTP-19807, OTP-19809, OTP-19811, OTP-19815,
OTP-19822, OTP-19826, OTP-19834, OTP-19838,
OTP-19842, OTP-19853, OTP-19858, OTP-19866,
OTP-19874, OTP-19882, OTP-19887, OTP-19898,
OTP-19903, OTP-19906, OTP-19910, OTP-19912,
OTP-19917, OTP-19918, OTP-19919, OTP-19921,
OTP-19922, OTP-19925, OTP-19927, OTP-19932,
OTP-19933, OTP-19934, OTP-19935, OTP-19936,
OTP-19938, OTP-19942, OTP-19943, OTP-19949,
OTP-19956, OTP-19960, OTP-19963, OTP-19964,
OTP-19965, OTP-19966, OTP-19968, OTP-19969,
OTP-19975, OTP-19980, OTP-19982, OTP-19991,
OTP-19995, OTP-19996, OTP-19997, OTP-20001,
OTP-20002, OTP-20003, OTP-20004, OTP-20010,
OTP-20013, OTP-20015, OTP-20016, OTP-20017,
OTP-20019, OTP-20020, OTP-20023, OTP-20025,
OTP-20026, OTP-20028, OTP-20029, OTP-20030,
OTP-20031, OTP-20032, OTP-20034, OTP-20035,
OTP-20036, OTP-20045, OTP-20048, OTP-20054,
OTP-20055, OTP-20059, OTP-20061, OTP-20066,
OTP-20069, OTP-20070, OTP-20071, OTP-20072,
OTP-20073, OTP-20076, OTP-20077, OTP-20078,
OTP-20079, OTP-20080, OTP-20085, OTP-20087,
OTP-20088, OTP-20090, OTP-20092, OTP-20095,
OTP-20099, OTP-20100, OTP-20102, OTP-20103,
OTP-20111, OTP-20114, OTP-20115, OTP-20116,
OTP-20117, OTP-20119, OTP-20123, OTP-20124,
OTP-20125, OTP-20126, OTP-20127, OTP-20128,
OTP-20132, OTP-20133
Seq num: ERIERL-1314, ERIERL-1315, ERIERL-1319,
GH-10071, GH-10125, GH-10151, GH-10214,
GH-10260, GH-10341, GH-10342, GH-10345,
GH-10557, GH-10650, GH-10807, GH-10968,
GH-11030, GH-8569, GH-8841, GH-8993, GH-9822,
OTP-16608, OTP-19652, OTP-19775, OTP-19779,
OTP-19827, OTP-20106, PR-10013, PR-10033,
PR-10078, PR-10114, PR-10115, PR-10126,
PR-10134, PR-10144, PR-10145, PR-10161,
PR-10166, PR-10168, PR-10187, PR-10189,
PR-10193, PR-10195, PR-10197, PR-10202,
PR-10207, PR-10230, PR-10234, PR-10243,
PR-10253, PR-10259, PR-10269, PR-10276,
PR-10277, PR-10281, PR-10304, PR-10338,
PR-10346, PR-10348, PR-10372, PR-10382,
PR-10387, PR-10417, PR-10421, PR-10422,
PR-10426, PR-10433, PR-10449, PR-10453,
PR-10478, PR-10510, PR-10511, PR-10514,
PR-10519, PR-10524, PR-10532, PR-10549,
PR-10554, PR-10556, PR-10564, PR-10568,
PR-10571, PR-10573, PR-10578, PR-10579,
PR-10580, PR-10585, PR-10592, PR-10598,
PR-10601, PR-10614, PR-10615, PR-10617,
PR-10619, PR-10626, PR-10642, PR-10646,
PR-10647, PR-10653, PR-10656, PR-10674,
PR-10710, PR-10718, PR-10730, PR-10735,
PR-10739, PR-10753, PR-10754, PR-10755,
PR-10770, PR-10782, PR-10783, PR-10801,
PR-10804, PR-10805, PR-10808, PR-10814,
PR-10817, PR-10818, PR-10819, PR-10820,
PR-10821, PR-10824, PR-10830, PR-10836,
PR-10838, PR-10839, PR-10870, PR-10892,
PR-10894, PR-10905, PR-10910, PR-10929,
PR-10938, PR-10948, PR-10949, PR-10950,
PR-10951, PR-10958, PR-10962, PR-10965,
PR-10969, PR-10970, PR-10979, PR-10986,
PR-10993, PR-10998, PR-11000, PR-11004,
PR-11010, PR-11012, PR-11019, PR-11025,
PR-11031, PR-11032, PR-11047, PR-11059,
PR-11062, PR-11067, PR-11069, PR-11073,
PR-11078, PR-11079, PR-11080, PR-7118,
PR-7315, PR-9115, PR-9125, PR-9134, PR-9153,
PR-9209, PR-9223, PR-9315, PR-9374, PR-9475,
PR-9712, PR-9814, PR-9864, PR-9866, PR-9894,
PR-9899, PR-9934, PR-9940, PR-9984
System: OTP
Release: 29
Application: asn1-5.5, common_test-1.31, compiler-10.0,
crypto-5.9, debugger-7.0, dialyzer-6.0,
diameter-2.7, edoc-1.5, eldap-1.3,
erl_interface-5.8, erts-17.0, et-1.8,
eunit-2.11, ftp-1.2.5, inets-9.7,
jinterface-1.16, kernel-11.0, megaco-4.9,
mnesia-4.26, observer-2.19, odbc-2.17,
os_mon-2.12, parsetools-2.8, public_key-1.21,
reltool-1.1, runtime_tools-2.4, sasl-4.4,
snmp-5.20.3, ssh-6.0, ssl-11.7, stdlib-8.0,
syntax_tools-4.1, tftp-1.3, tools-4.2,
wx-2.6, xmerl-2.2
Predecessor: OTP
Check out the git tag OTP-29.0, and build a full OTP system including
documentation.
# HIGHLIGHTS
- The JIT now generates better code for matching or creating binaries with
multiple little-endian segments.
Own Id: OTP-19747
Application(s): erts
Related Id(s): PR-10126
- In the documentation for the `compile` module, a section has been added with
recommendations for implementors of languages running on the BEAM.
Documentation has also been added for the `to_abstr`, `to_exp`, and
`from_abstr` options.
The documentation for erlc now lists `.abstr` as one of the supported
options.
When compiling with the `to_abstr` option, the resulting `.abstr` file now
retains any `-doc` attributes present in the source code.
Own Id: OTP-19784
Application(s): compiler, erts
Related Id(s): PR-10230, PR-10234
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Application(s): compiler, debugger, dialyzer, erts, stdlib
Related Id(s): PR-10617
- The guard BIF `is_integer/3` has been added. It follows the design of the
original EEP-16, only changing the name from `is_between` to `is_integer`.
This BIF takes in 3 parameters, `Term`, `LowerBound`, and `UpperBound`.
It returns `true` if `Term`, `LowerBound`, and `UpperBound` are all integers,
and `LowerBound =< Term =< UpperBound`; otherwise, it returns false.
Example:
1> I = 42.
2> is_integer(I, 0, 100).
true
Own Id: OTP-19809
Application(s): compiler, dialyzer, erts
Related Id(s): PR-10276
- There are new functions for random permutation of a list: rand:shuffle/1 and
rand:shuffle_s/2. They are inspired by a suggestion and discussion on
ErlangForums.
Own Id: OTP-19826
Application(s): stdlib
Related Id(s): PR-10281
- In the default code path for the Erlang system, the current working directory
(`.`) is now in the last position instead of the first.
Own Id: OTP-19842
Application(s): erts, kernel
*** POTENTIAL INCOMPATIBILITY ***
- Function application is now left associative. That means one can now write:
f(X)(Y)
instead of:
(f(X))(Y)
Own Id: OTP-19866
Application(s): compiler
Related Id(s): PR-9223
- The old-style type tests in guards (`integer`, `atom`, and so on) have been
scheduled for removal in Erlang/OTP 30. They have been deprecated for a long
time.
Own Id: OTP-19887
Application(s): otp
Related Id(s): PR-10417
- There will now be a warning when exporting variables out of a subexpression.
For example:
case file:open(File, AllOpts = [write,{encoding,utf8}]) of
{ok,Fd} ->
{Fd,AllOpts}
end
To avoid the warning, this can be rewritten to:
AllOpts = [write,{encoding,utf8}],
case file:open(File, AllOpts) of
{ok,Fd} ->
{Fd,AllOpts}
end
The warning can be suppressed by giving option `nowarn_export_var_subexpr` to
the compiler.
Own Id: OTP-19898
Application(s): compiler, stdlib
Related Id(s): PR-9134
- There is a new option `warn_obsolete_bool_op` that instruct the compiler to
emit warnings for the `and` and `or` operators. It is recommended to instead
use the modern `andalso` and `orelse` operators, or `,` and `;` in guards.
Own Id: OTP-19918
Application(s): compiler
Related Id(s): PR-9115
- `graph` is a new module that is a functional equivalent of the `digraph` and
`digraph_utils` modules.
Own Id: OTP-19922
Application(s): stdlib
Related Id(s): PR-10532
- Before Erlang/OTP 29, attempting to bind variables in a comprehension would
compile successfully but fail at runtime. Example:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
* exception error: bad filter 2614250
In Erlang/OTP 29, attempting to bind a variable in a comprehension will fail
by default:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
* 5:14: matches using '=' are not allowed in comprehension qualifiers
unless the experimental 'compr_assign' language feature is enabled.
With 'compr_assign' enabled, a match 'P = E' will behave as a
strict generator 'P <-:- [E]'."
However, this example will work as expected if the `compr_assign` feature is
enabled when starting the runtime system:
$ erl -enable-feature compr_assign
. . .
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
[2614250]
Here is another example how `compr_assign` can be used:
-module(example).
-feature(compr_assign, enable).
-export([cat/1]).
cat(Files) ->
[Char || F <- Files,
{ok, Bin} = file:read_file(F),
Char <- unicode:characters_to_list(Bin)].
Own Id: OTP-19927
Application(s): compiler, stdlib
Related Id(s): PR-9153
*** POTENTIAL INCOMPATIBILITY ***
- There will now be a warning when using the `catch` operator, which has been
deprecated for a long time.
It is recommended to instead use `try`...`catch`...`end` but is also possible
to disable the warning by using the `nowarn_deprecated_catch` option.
Own Id: OTP-19938
Application(s): compiler, stdlib
Related Id(s): PR-10421
- Multi-valued comprehensions according to EEP 78 has been implemented.
Example:
> [I, -I || I <- lists:seq(1, 5)].
[1,-1,2,-2,3,-3,4,-4,5,-5]
Own Id: OTP-19942
Application(s): compiler, debugger, stdlib, syntax_tools
Related Id(s): PR-9374
- There will now be a warning for matches that unify constructors, such as the
following:
m({a,B} = {Y,Z}) -> . . .
Such a match can be rewritten to:
m({a=Y,B=Y}) -> . . .
The compiler option `nowarn_match_alias_pats` can be used to disable the
warning.
Own Id: OTP-19943
Application(s): compiler, stdlib
Related Id(s): PR-10433
- There is no longer a 32-bit Erlang/OTP build for Windows.
Own Id: OTP-19960
Application(s): otp
- While the iteration order for maps is undefined, it is now guaranteed that all
ways of iterating over maps provides the elements in the same order. That is,
all of the following ways of iterating will produce the elements in the same
order:
- maps:keys/1
- maps:values/1
- maps:to_list/1
- `maps:to_list(maps:iterator(M))`
- Map comprehension: `{K,V} || K := V <- M`
Own Id: OTP-19963
Application(s): erts, stdlib
Related Id(s): PR-10626
- The default key exchange algorithm is now mlkem768x25519-sha256, a hybrid
quantum-resistant algorithm combining ML-KEM-768 with X25519. This provides
protection against both classical and quantum computer attacks while
maintaining backward compatibility through automatic fallback to other
algorithms when peers don't support it.
Own Id: OTP-19965
Application(s): ssh
Related Id(s): PR-10656
*** POTENTIAL INCOMPATIBILITY ***
- The compiler now generates more efficient code for map comprehensions with
constant values that don't depend on the generator, such as the following:
#{K => 42} || K <- List}.
#{K => X || K <- List}.
#{K => {X, Y} || K <- List}.
Own Id: OTP-19968
Application(s): compiler
Related Id(s): PR-10646
- The SSH daemon now defaults to disabled for shell and exec services,
implementing the "secure by default" principle. This prevents authenticated
users from executing arbitrary Erlang code unless explicitly configured.
Applications requiring shell or exec functionality must now explicitly enable:
%% Enable Erlang shell
ssh:daemon(Port, [{shell, {shell, start, []}} | Options])
%% Enable Erlang term evaluation via exec
ssh:daemon(Port, [{exec, erlang_eval} | Options])
%% Restore complete old behavior
ssh:daemon(Port, [{shell, {shell, start, []}},
{exec, erlang_eval}
| Options])
Own Id: OTP-19969
Application(s): ssh
Related Id(s): ERIERL-1319, PR-10970, PR-11080
*** POTENTIAL INCOMPATIBILITY ***
- The `odbc` application is now deprecated and is planned to be removed in
Erlang/OTP 30.
The `ftp` and `ct_ftp` modules are now deprecated and are planned to be
removed in Erlang/OTP 30.
Own Id: OTP-19980
Application(s): ftp, odbc
Related Id(s): PR-10804
- The `array` module have been extended with several new functions. The internal
representation have been changed to allow the new functionality and
optimizations. Arrays serialized with `term_to_binary/1` in previous releases
are not compatible.
Own Id: OTP-20004
Application(s): stdlib
Related Id(s): PR-10578
*** POTENTIAL INCOMPATIBILITY ***
- Added support for socket functions `recvmmsg()` and `sendmmsg()`.
Own Id: OTP-20015
Application(s): erts, kernel
Related Id(s): PR-10564
- `m:erl_tar` will use less memory when extracting large tar entries to disk.
Instead of reading each tar entry into memory, `erl_tar` will now stream
data in chunks of 64KB. The chunk size is settable using the new
`{chunks,ChunkSize}` option.
The new `{max_size,Size}` option will set a limit on the total size of
extracted data to protect against filling up the disk.
Checking of symlinks has been improved. Some symlinks that were safe (such as
`dir/link -> ../file`) used to be rejected.
Own Id: OTP-20023
Application(s): stdlib
Related Id(s): PR-10814, PR-10818, PR-10821
- Added a new module called `io_ansi` that allows the user to emit Virtual
Terminal Sequences (a.k.a. ANSI sequences) to the terminal in order to add
colors/styling to text or create fully-fledged terminal applications.
`io_ansi` uses the local terminfo database in order to be as cross-platform
compatible as possible.
It also works across nodes so that if functions on a remote node call
io_ansi:fwrite/1 it will use the destination terminal's terminfo database to
determine which sequences to emit. In practice, this means that you can call
functions in a remote shell session that use `io_ansi` and it will properly
detect the terminal sequences the target terminal can handle and will print
using them correctly.
Own Id: OTP-20028
Application(s): kernel, stdlib
Related Id(s): PR-10905, PR-9940
- The `ignore_xref` attribute has been handled as a post-analysis filter by
build tools such as Rebar3. In this release, `xref` itself does the
filtering, ensuring that all tooling that calls `xref` for any purpose can
rely on these declarations to just work.
Own Id: OTP-20032
Application(s): tools
Related Id(s): PR-10592
- New in this release is `ct_doctest`, a module that allows the user to test
documentation examples in Erlang module docs and documentation files.
ct_doctest allows you to:
- Test code examples using shell syntax and their returns
- Test code examples that should fail
- Write example modules that are compiled and available in shell examples
- Plugin other documentation parsing engines so that examples in, for example,
`edoc`, `asciidoc`, and others can also be tested.
See the documentation for more details.
Own Id: OTP-20034
Application(s): common_test
Related Id(s): PR-10824, PR-9315
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Application(s): asn1, common_test, compiler, crypto, debugger, dialyzer,
diameter, edoc, eunit, inets, kernel, megaco, mnesia, observer, odbc, os_mon,
otp, parsetools, public_key, reltool, runtime_tools, sasl, ssh, ssl, stdlib,
syntax_tools, tftp, tools, wx, xmerl
Related Id(s): PR-10839
- The post-quantum hybrid algorithm x25519mlkem768 is now the most preferred key
exchange group in the default configuration.
Post-quantum hybrid algorithms secp384r1mlkem1024 and secp256r1mlkem768 are
supported but have to be configured. The same goes for the plain post-quantum
algorithms mlkem1024, mlkem768, and mlkem512.
The most preferred signature algorithms is now post-quantum algorithms ML-DSA
followed by the fastest SLH-DSA (slh_dsa_sha2_256f) algorithm, if such a
certificate is available in the configuration. Other SLH-DSA variants are also
supported but are added to the end of the preferred list.
All these algorithms were available in OTP-28.4 but none of them were
preferred and some of them changed default status.
Own Id: OTP-20070
Application(s): ssl
Related Id(s): PR-10949
*** POTENTIAL INCOMPATIBILITY ***
- The `json` module now encodes and decodes quoted strings faster.
Improvements of up to 55 percent has been measured when decoding JSON data
with long strings.
The string:length/1, string:slice/2, and string:slice/3 functions have
been optimized. For some strings, they can be up to twice as fast.
Own Id: OTP-20072
Application(s): stdlib
Related Id(s): PR-10938, PR-10948
- The SFTP subsystem is no longer enabled by default when starting an SSH
daemon. To enable it, add the subsystems option explicitly:
ssh:daemon(Port, [{subsystems, [ssh_sftpd:subsystem_spec([])]} | Options])
Own Id: OTP-20078
Application(s): ssh
Related Id(s): PR-10970
*** POTENTIAL INCOMPATIBILITY ***
- The runtime system now supports generating encrypted crash dumps. See the
description of `--enable-encrypted-crash-dumps` in [Building and Installing
Erlang/OTP].
Own Id: OTP-20085
Application(s): crypto, erts, public_key, tools
Related Id(s): PR-10993
- There is a new Hardening guide giving guidelines on how to strengthen the
security for the `ssl` application.
Own Id: OTP-20087
Application(s): ssl
Related Id(s): PR-11019
- There is a new Hardening guide with advice for configuring Inets to be more
secure.
Own Id: OTP-20133
Application(s): inets
Related Id(s): PR-11073
# POTENTIAL INCOMPATIBILITIES
- Fixed (`inet`) module selection when calling (`gen_tcp`) listen and connect
and (`gen_udp`) open. Depending on the order of the options, the module option
(`tcp_module` or `udp_module`) was sometimes ignored.
Own Id: OTP-19695
Application(s): kernel
Related Id(s): GH-9822, PR-10013
- `ssh:stop_deamon` now uses `supervisor:stop` for shutting down daemons. With
this change, the scenario when `ssh:stop_daemon` is called for a non-existing
process results in calling process exiting. Previously an error tuple was
returned (which was not documented).
Own Id: OTP-19801
Application(s): ssh
Related Id(s): PR-10253
- The `mnesia_registry` module has been removed.
Own Id: OTP-19807
Application(s): mnesia
Related Id(s): PR-7315
- In the default code path for the Erlang system, the current working directory
(`.`) is now in the last position instead of the first.
Own Id: OTP-19842
Application(s): erts, kernel
*** HIGHLIGHT ***
- Before Erlang/OTP 29, attempting to bind variables in a comprehension would
compile successfully but fail at runtime. Example:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
* exception error: bad filter 2614250
In Erlang/OTP 29, attempting to bind a variable in a comprehension will fail
by default:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
* 5:14: matches using '=' are not allowed in comprehension qualifiers
unless the experimental 'compr_assign' language feature is enabled.
With 'compr_assign' enabled, a match 'P = E' will behave as a
strict generator 'P <-:- [E]'."
However, this example will work as expected if the `compr_assign` feature is
enabled when starting the runtime system:
$ erl -enable-feature compr_assign
. . .
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
[2614250]
Here is another example how `compr_assign` can be used:
-module(example).
-feature(compr_assign, enable).
-export([cat/1]).
cat(Files) ->
[Char || F <- Files,
{ok, Bin} = file:read_file(F),
Char <- unicode:characters_to_list(Bin)].
Own Id: OTP-19927
Application(s): compiler, stdlib
Related Id(s): PR-9153
*** HIGHLIGHT ***
- The default key exchange algorithm is now mlkem768x25519-sha256, a hybrid
quantum-resistant algorithm combining ML-KEM-768 with X25519. This provides
protection against both classical and quantum computer attacks while
maintaining backward compatibility through automatic fallback to other
algorithms when peers don't support it.
Own Id: OTP-19965
Application(s): ssh
Related Id(s): PR-10656
*** HIGHLIGHT ***
- The SSH daemon now defaults to disabled for shell and exec services,
implementing the "secure by default" principle. This prevents authenticated
users from executing arbitrary Erlang code unless explicitly configured.
Applications requiring shell or exec functionality must now explicitly enable:
%% Enable Erlang shell
ssh:daemon(Port, [{shell, {shell, start, []}} | Options])
%% Enable Erlang term evaluation via exec
ssh:daemon(Port, [{exec, erlang_eval} | Options])
%% Restore complete old behavior
ssh:daemon(Port, [{shell, {shell, start, []}},
{exec, erlang_eval}
| Options])
Own Id: OTP-19969
Application(s): ssh
Related Id(s): ERIERL-1319, PR-10970, PR-11080
*** HIGHLIGHT ***
- Changed ets:update_counter/4 and ets:update_element/4 to _always_ reject
default tuples smaller than the `keypos` of the table. Such keyless tuples are
now rejected even if the key exists in the table and the default tuple would
not be used. This is a subtle semantic change but is a nicer behavior for
development and testing as it will detect faulty default tuple arguments
earlier.
Own Id: OTP-19975
Application(s): erts
Related Id(s): PR-10674
- Added explicit size validation guards for pre-authentication SSH messages to
improve defense-in-depth against DoS attacks. Messages now have per-field size
limits based on RFC specifications:
- Transport layer messages (DISCONNECT, IGNORE, DEBUG)
- Key exchange messages (DH, ECDH, DH-GEX)
- Service request messages (SERVICE_REQUEST, SERVICE_ACCEPT, EXT_INFO)
This change enhances the existing 256KB global packet size limit with granular
per-message validation. Compliant implementations are not affected.
Own Id: OTP-19995
Application(s): ssh
Related Id(s): PR-10739
- The `array` module have been extended with several new functions. The internal
representation have been changed to allow the new functionality and
optimizations. Arrays serialized with `term_to_binary/1` in previous releases
are not compatible.
Own Id: OTP-20004
Application(s): stdlib
Related Id(s): PR-10578
*** HIGHLIGHT ***
- The SFTP subsystem `root` option now properly rejects relative paths at daemon
startup. Previously, relative paths would cause unpredictable behavior as file
operations resolved relative to the Erlang VM's current working directory. The
option now requires an absolute path or empty string.
Own Id: OTP-20019
Application(s): ssh
Related Id(s): PR-10820
- The gb_sets:from_ordset/1 and gb_trees:from_orddict/1 functions would
trust their inputs. If the input contained duplicates or was not properly
sorted, the resulting gb_set or gb_tree would be invalid, and any number of
interesting problems could occur.
In this release, these functions will raise an exception if their input is not
valid. That could mean that incorrect programs that **seemed** to work could
now stop working altogether.
There is also a new gb_trees:from_list/1 function for directly creating a
gb_tree from a list.
Own Id: OTP-20061
Application(s): stdlib
Related Id(s): PR-10910
- The post-quantum hybrid algorithm x25519mlkem768 is now the most preferred key
exchange group in the default configuration.
Post-quantum hybrid algorithms secp384r1mlkem1024 and secp256r1mlkem768 are
supported but have to be configured. The same goes for the plain post-quantum
algorithms mlkem1024, mlkem768, and mlkem512.
The most preferred signature algorithms is now post-quantum algorithms ML-DSA
followed by the fastest SLH-DSA (slh_dsa_sha2_256f) algorithm, if such a
certificate is available in the configuration. Other SLH-DSA variants are also
supported but are added to the end of the preferred list.
All these algorithms were available in OTP-28.4 but none of them were
preferred and some of them changed default status.
Own Id: OTP-20070
Application(s): ssl
Related Id(s): PR-10949
*** HIGHLIGHT ***
- The old Tcl-based implementation of `erl_errno_id()` has been replaced by our
own implementation now supporting more `errno` values on modern operating
systems. It also returns the string `"errno_<ERRNO_INTEGER>"` corresponding to
the integer given as argument if the `errno` integer is unknown instead of as
previously just return the string `"unknown"`.
The result of `erl_errno_id()` is often converted into an atom and passed as
an error from a driver or a NIF.
Own Id: OTP-20076
Application(s): erts
Related Id(s): PR-10958, PR-10969
- The SFTP subsystem is no longer enabled by default when starting an SSH
daemon. To enable it, add the subsystems option explicitly:
ssh:daemon(Port, [{subsystems, [ssh_sftpd:subsystem_spec([])]} | Options])
Own Id: OTP-20078
Application(s): ssh
Related Id(s): PR-10970
*** HIGHLIGHT ***
- Secure renegotiation for TLS-1.2 specified in RFC 5746 from 2010 is now always
used. The interoperability fallback option
`{secure_renegotiate,SecureRenegotiate}` is no longer needed.
Own Id: OTP-20080
Application(s): ssl
Related Id(s): PR-10979
- The erlang:suspend_process/1 and erlang:suspend_process/2 BIFs now also
suspend BIF timers that will send messages to the process if the timer was
created using the PID of the process as destination. Timers created using
registered names are not affected.
Own Id: OTP-20095
Application(s): erts
Related Id(s): PR-10619, PR-11004
- The TOS handling on socket has been significantlyupdated and improved. Socket
did not properly handle set, get and recv (cmsg) of TOS.
Note that the returned TOS value has been changed. It was previously an atom
or an integer. Now it is a map with different interpretations of the TOS
octet. See the documentation.
Own Id: OTP-20102
Application(s): erts, kernel
Related Id(s): GH-10968, PR-11059
# OTP-29.0
## Fixed Bugs and Malfunctions
- The `start_erl` script will now work on embedded systems.
Own Id: OTP-20111
Related Id(s): GH-10342, PR-10346
## Improvements and New Features
- Vendor dependencies and OpenVEX statements in the `otp` repository is now
scanned for vulnerabilities. It is verified that OTP security issues reported
at Github exist in the published OpenVEX statements, and issues are
automatically opened in the `otp` repository if vendor vulnerabilities are
detected.
Own Id: OTP-19763
Related Id(s): PR-10145, PR-10166, PR-10168, PR-10189, PR-10193,
PR-10195, PR-10197, PR-10202, OTP-19652, OTP-19775, OTP-19779
- Documentation about how to validate the SBOM using sigstore has been added.
Own Id: OTP-19766
Related Id(s): GH-10151, PR-10187
- The old-style type tests in guards (`integer`, `atom`, and so on) have been
scheduled for removal in Erlang/OTP 30. They have been deprecated for a long
time.
Own Id: OTP-19887
Related Id(s): PR-10417
*** HIGHLIGHT ***
- Removed the undocumented `dyn_erl` utility.
Own Id: OTP-19933
Related Id(s): PR-10573
- There is no longer a 32-bit Erlang/OTP build for Windows.
Own Id: OTP-19960
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The Upcoming Potential Incompatibilities page has been updated to note that
in Erlang/OTP 30, `erlang:fun_info(Fun, pid)` will no longer retrieve a pid,
but will raise a `badarg` exception.
Own Id: OTP-20092
Related Id(s): PR-10998
- Add security improvements to GitHub Actions workflows based on findings from
`zizmor`, a GitHub Actions security linter.
Own Id: OTP-20103
Related Id(s): PR-11000
- Improve mermaid diagram rending in documentation.
Own Id: OTP-20132
Related Id(s): PR-11047
# asn1-5.5
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of asn1-5.5
>
> erts-14.0, kernel-9.0, stdlib-5.0
# common_test-1.31
## Fixed Bugs and Malfunctions
- Improved support for QuickCheck when writing property tests.
Own Id: OTP-20010
Related Id(s): PR-10783
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- `'EXIT'` messages are now formatted in the same way as `badmatch` errors.
Own Id: OTP-19910
Related Id(s): PR-10277
- Error notifications now contain the name of the source file in which the error
occurred.
Own Id: OTP-19925
Related Id(s): GH-10260, PR-10269
- New in this release is `ct_doctest`, a module that allows the user to test
documentation examples in Erlang module docs and documentation files.
ct_doctest allows you to:
- Test code examples using shell syntax and their returns
- Test code examples that should fail
- Write example modules that are compiled and available in shell examples
- Plugin other documentation parsing engines so that examples in, for example,
`edoc`, `asciidoc`, and others can also be tested.
See the documentation for more details.
Own Id: OTP-20034
Related Id(s): PR-10824, PR-9315
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of common_test-1.31
>
> compiler-10.0, crypto-4.5, debugger-4.1, erts-7.0, ftp-1.0, inets-6.0,
> kernel-11.0, observer-2.1, runtime_tools-1.8.16, sasl-2.5, snmp-5.1.2,
> ssh-4.0, stdlib-8.0, syntax_tools-1.7, tools-3.2, xmerl-1.3.8
# compiler-10.0
## Fixed Bugs and Malfunctions
- For a function such as the following:
bar(S0) ->
S1 = setelement(8, S0, a),
S2 = setelement(7, S1, b),
setelement(5, S2, c).
the compiler would keep all of the calls to `setelement/3` and emit extra
unnecessary `set_tuple_element` instructions.
This has been corrected so that the compiler will never emit code that uses
the `set_tuple_element` instruction. In a future release, support for the
`set_tuple_element` will be removed from the runtime system.
Own Id: OTP-19751
Related Id(s): GH-10125, PR-10144
- beam_lib:strip/1 will now retain the Beam debug information chunk produced
by the `beam_debug_info` option. The chunk will also be retained when combing
the `beam_debug_info` option with the undocumented `slim` option.
The runtime system will no longer crash when attempting to load modules that
have been compiled with `beam_debug_info` but lack the actual Beam debug info
chunk.
Own Id: OTP-19991
Related Id(s): GH-10557, PR-10735
## Improvements and New Features
- In comprehensions, a generator that builds a list with a single element will
now be optimized to avoid building and matching the list. Example:
[H || E <- List, H <- [erlang:phash2(E)], H rem 10 =:= 0]
Own Id: OTP-19672
Related Id(s): PR-9934
- In the documentation for the `compile` module, a section has been added with
recommendations for implementors of languages running on the BEAM.
Documentation has also been added for the `to_abstr`, `to_exp`, and
`from_abstr` options.
The documentation for erlc now lists `.abstr` as one of the supported
options.
When compiling with the `to_abstr` option, the resulting `.abstr` file now
retains any `-doc` attributes present in the source code.
Own Id: OTP-19784
Related Id(s): PR-10230, PR-10234
*** HIGHLIGHT ***
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Related Id(s): PR-10617
*** HIGHLIGHT ***
- The guard BIF `is_integer/3` has been added. It follows the design of the
original EEP-16, only changing the name from `is_between` to `is_integer`.
This BIF takes in 3 parameters, `Term`, `LowerBound`, and `UpperBound`.
It returns `true` if `Term`, `LowerBound`, and `UpperBound` are all integers,
and `LowerBound =< Term =< UpperBound`; otherwise, it returns false.
Example:
1> I = 42.
2> is_integer(I, 0, 100).
true
Own Id: OTP-19809
Related Id(s): PR-10276
*** HIGHLIGHT ***
- Function application is now left associative. That means one can now write:
f(X)(Y)
instead of:
(f(X))(Y)
Own Id: OTP-19866
Related Id(s): PR-9223
*** HIGHLIGHT ***
- There will now be a warning when exporting variables out of a subexpression.
For example:
case file:open(File, AllOpts = [write,{encoding,utf8}]) of
{ok,Fd} ->
{Fd,AllOpts}
end
To avoid the warning, this can be rewritten to:
AllOpts = [write,{encoding,utf8}],
case file:open(File, AllOpts) of
{ok,Fd} ->
{Fd,AllOpts}
end
The warning can be suppressed by giving option `nowarn_export_var_subexpr` to
the compiler.
Own Id: OTP-19898
Related Id(s): PR-9134
*** HIGHLIGHT ***
- There is a new option `warn_obsolete_bool_op` that instruct the compiler to
emit warnings for the `and` and `or` operators. It is recommended to instead
use the modern `andalso` and `orelse` operators, or `,` and `;` in guards.
Own Id: OTP-19918
Related Id(s): PR-9115
*** HIGHLIGHT ***
- Before Erlang/OTP 29, attempting to bind variables in a comprehension would
compile successfully but fail at runtime. Example:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
* exception error: bad filter 2614250
In Erlang/OTP 29, attempting to bind a variable in a comprehension will fail
by default:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
* 5:14: matches using '=' are not allowed in comprehension qualifiers
unless the experimental 'compr_assign' language feature is enabled.
With 'compr_assign' enabled, a match 'P = E' will behave as a
strict generator 'P <-:- [E]'."
However, this example will work as expected if the `compr_assign` feature is
enabled when starting the runtime system:
$ erl -enable-feature compr_assign
. . .
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
[2614250]
Here is another example how `compr_assign` can be used:
-module(example).
-feature(compr_assign, enable).
-export([cat/1]).
cat(Files) ->
[Char || F <- Files,
{ok, Bin} = file:read_file(F),
Char <- unicode:characters_to_list(Bin)].
Own Id: OTP-19927
Related Id(s): PR-9153
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- There will now be a warning when using the `catch` operator, which has been
deprecated for a long time.
It is recommended to instead use `try`...`catch`...`end` but is also possible
to disable the warning by using the `nowarn_deprecated_catch` option.
Own Id: OTP-19938
Related Id(s): PR-10421
*** HIGHLIGHT ***
- Multi-valued comprehensions according to EEP 78 has been implemented.
Example:
> [I, -I || I <- lists:seq(1, 5)].
[1,-1,2,-2,3,-3,4,-4,5,-5]
Own Id: OTP-19942
Related Id(s): PR-9374
*** HIGHLIGHT ***
- There will now be a warning for matches that unify constructors, such as the
following:
m({a,B} = {Y,Z}) -> . . .
Such a match can be rewritten to:
m({a=Y,B=Y}) -> . . .
The compiler option `nowarn_match_alias_pats` can be used to disable the
warning.
Own Id: OTP-19943
Related Id(s): PR-10433
*** HIGHLIGHT ***
- The compiler now generates more efficient code for map comprehensions with
constant values that don't depend on the generator, such as the following:
#{K => 42} || K <- List}.
#{K => X || K <- List}.
#{K => {X, Y} || K <- List}.
Own Id: OTP-19968
Related Id(s): PR-10646
*** HIGHLIGHT ***
- Compilation times of modules with a huge number of calls to `element/2` has
been improved.
Own Id: OTP-20020
Related Id(s): GH-10807, PR-10819
- The format of the debug information stored by the `beam_debug_info` option
(used by the edb debugger) has been updated to more easily extendible and to
contain more information about call targets. (See the linked PR for more
details.)
Own Id: OTP-20048
Related Id(s): PR-9814
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of compiler-10.0
>
> crypto-5.1, erts-13.0, kernel-8.4, stdlib-8.0
# crypto-5.9
## Fixed Bugs and Malfunctions
- Fixed crypto:hash_equals/2 and FIPS when crypto is statically linked to the
beam (with `--enable-static-nifs` and `--disable-dynamic-ssl-lib`).
Own Id: OTP-20025
Related Id(s): PR-10817
## Improvements and New Features
- The rand:bytes/1 and rand:bytes_s/2 functions have been optimized by
implementing a new internal callback function that crypto:rand_seed_alg/1
and crypto:alg_seed_alg_s/1 have been updated to use.
A new algorithm `crypto_prng1`, which also takes advantage of this new
internal callback, has been added to crypto:rand_seed_alg/2 and
crypto:rand_seed_alg_s/2. It is much faster then the existing `crypto_aes`,
in particular for generating bytes.
Own Id: OTP-19882
Related Id(s): PR-10453, OTP-19827
- In interactive mode, application `crypto` is automatically loaded when the
`crypto` module is loaded. This will ensure that the correct value of
configuration parameter `fips_mode` is used to initialize OpenSSL if module
`crypto` is called/loaded before the application `crypto` has been loaded. In
embedded mode, module `crypto` will fail to load if the application has not
been loaded.
Own Id: OTP-20035
Related Id(s): PR-10830
- OpenSSL engine support has been removed on Windows.
Own Id: OTP-20036
Related Id(s): PR-10836
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The runtime system now supports generating encrypted crash dumps. See the
description of `--enable-encrypted-crash-dumps` in [Building and Installing
Erlang/OTP].
Own Id: OTP-20085
Related Id(s): PR-10993
*** HIGHLIGHT ***
> #### Full runtime dependencies of crypto-5.9
>
> erts-9.0, kernel-6.0, stdlib-3.9
# debugger-7.0
## Improvements and New Features
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Related Id(s): PR-10617
*** HIGHLIGHT ***
- Tools such as the debugger, `beam_lib`, and `xref` no longer support BEAM
files created before OTP 13B.
Own Id: OTP-19906
Related Id(s): PR-10519
- Multi-valued comprehensions according to EEP 78 has been implemented.
Example:
> [I, -I || I <- lists:seq(1, 5)].
[1,-1,2,-2,3,-3,4,-4,5,-5]
Own Id: OTP-19942
Related Id(s): PR-9374
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of debugger-7.0
>
> compiler-8.0, erts-15.0, kernel-10.0, stdlib-7.0, wx-2.0
# dialyzer-6.0
## Improvements and New Features
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Related Id(s): PR-10617
*** HIGHLIGHT ***
- The guard BIF `is_integer/3` has been added. It follows the design of the
original EEP-16, only changing the name from `is_between` to `is_integer`.
This BIF takes in 3 parameters, `Term`, `LowerBound`, and `UpperBound`.
It returns `true` if `Term`, `LowerBound`, and `UpperBound` are all integers,
and `LowerBound =< Term =< UpperBound`; otherwise, it returns false.
Example:
1> I = 42.
2> is_integer(I, 0, 100).
true
Own Id: OTP-19809
Related Id(s): PR-10276
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of dialyzer-6.0
>
> compiler-10.0, erts-12.0, kernel-8.0, stdlib-5.0, syntax_tools-2.0
# diameter-2.7
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of diameter-2.7
>
> erts-10.0, kernel-3.2, ssl-9.0, stdlib-5.0
# edoc-1.5
## Improvements and New Features
- Changed behavior of EDoc so that when a module defines a private type and a
private function spec uses it, that type no longer gets included in the EDoc
chunk.
Own Id: OTP-20030
Related Id(s): PR-10770
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of edoc-1.5
>
> erts-11.0, inets-5.10, kernel-7.0, stdlib-4.0, syntax_tools-2.0, xmerl-1.3.7
# eldap-1.3
## Improvements and New Features
- Only minor internal changes.
Own Id: OTP-19964
> #### Full runtime dependencies of eldap-1.3
>
> asn1-3.0, erts-6.0, kernel-3.0, ssl-5.3.4, stdlib-3.4
# erl_interface-5.8
## Improvements and New Features
- Improved name consistency of EPMD protocol messages in documentation and code.
Renamed `PORT_PLEASE2_REQ` to `PORT2_REQ` and added prefix `EPMD_`.
Own Id: OTP-19734
Related Id(s): GH-10071, PR-10078
- Replaced embedded OpenSSL MD5 implementation.
Own Id: OTP-20045
Related Id(s): PR-10870
## Known Bugs and Problems
- The `ei` API for decoding/encoding terms is not fully 64-bit compatible since
terms that have a representation on the external term format larger than 2 GB
cannot be handled.
Own Id: OTP-16607
Related Id(s): OTP-16608
# erts-17.0
## Fixed Bugs and Malfunctions
- For a function such as the following:
bar(S0) ->
S1 = setelement(8, S0, a),
S2 = setelement(7, S1, b),
setelement(5, S2, c).
the compiler would keep all of the calls to `setelement/3` and emit extra
unnecessary `set_tuple_element` instructions.
This has been corrected so that the compiler will never emit code that uses
the `set_tuple_element` instruction. In a future release, support for the
`set_tuple_element` will be removed from the runtime system.
Own Id: OTP-19751
Related Id(s): GH-10125, PR-10144
- Improved the handling of the logging directory for the start script on
Unix-like systems, so that it no longer crashes when `$ROOTDIR/log` is not
writable.
Own Id: OTP-19874
Related Id(s): GH-10341, PR-10348
- The `-nocookie` option for `erl` is now documented.
Own Id: OTP-19935
Related Id(s): PR-10549
- beam_lib:strip/1 will now retain the Beam debug information chunk produced
by the `beam_debug_info` option. The chunk will also be retained when combing
the `beam_debug_info` option with the undocumented `slim` option.
The runtime system will no longer crash when attempting to load modules that
have been compiled with `beam_debug_info` but lack the actual Beam debug info
chunk.
Own Id: OTP-19991
Related Id(s): GH-10557, PR-10735
- Fixed potential symbol clashing on MacOS by passing `RTLD_LOCAL` to `dlopen`.
This will make symbols to not be resolvable between subsequently loaded
NIF/drivers, which is the default behavior on Linux and BSD.
Own Id: OTP-20026
Related Id(s): PR-10805
- The `configure` script used to call `isfinite()` with argument `0`. That could
fail on some platforms. This has been changed to call `isfinite()` with `1.0`
instead.
Own Id: OTP-20088
Related Id(s): PR-10965
- The TOS handling on socket has been significantlyupdated and improved. Socket
did not properly handle set, get and recv (cmsg) of TOS.
Note that the returned TOS value has been changed. It was previously an atom
or an integer. Now it is a map with different interpretations of the TOS
octet. See the documentation.
Own Id: OTP-20102
Related Id(s): GH-10968, PR-11059
*** POTENTIAL INCOMPATIBILITY ***
- Fixed `erlang:md5_init` to always return the same deterministic context
binary. Only an issue in OTP 28.5 when OTP was built with
`--disable-builtin-openssl` or `--enable-use-embedded-3pp-alternatives`.
Own Id: OTP-20123
- Added explicit configure test for C++ function `std::to_chars` if options
`--disable-builtin-ryu` or `--enable-use-embedded-3pp-alternatives` is used.
Own Id: OTP-20126
Related Id(s): PR-11067
## Improvements and New Features
- The exported name space of the `beam` executable has been cleaned to only
expose symbols of documented interfaces like NIF and driver APIs. This will
avoid accidental name clashes with, for example, our statically linked
variants of PCRE2 and ZSTD. NIFs and drivers that abuse undocumented internal
interfaces will fail to load due to this change.
Own Id: OTP-19643
Related Id(s): PR-9864
- Improved name consistency of EPMD protocol messages in documentation and code.
Renamed `PORT_PLEASE2_REQ` to `PORT2_REQ` and added prefix `EPMD_`.
Own Id: OTP-19734
Related Id(s): GH-10071, PR-10078
- The JIT now generates better code for matching or creating binaries with
multiple little-endian segments.
Own Id: OTP-19747
Related Id(s): PR-10126
*** HIGHLIGHT ***
- In the documentation for the `compile` module, a section has been added with
recommendations for implementors of languages running on the BEAM.
Documentation has also been added for the `to_abstr`, `to_exp`, and
`from_abstr` options.
The documentation for erlc now lists `.abstr` as one of the supported
options.
When compiling with the `to_abstr` option, the resulting `.abstr` file now
retains any `-doc` attributes present in the source code.
Own Id: OTP-19784
Related Id(s): PR-10230, PR-10234
*** HIGHLIGHT ***
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Related Id(s): PR-10617
*** HIGHLIGHT ***
- Task stealing between schedulers has been further optimized.
Own Id: OTP-19793
Related Id(s): PR-9984
- The guard BIF `is_integer/3` has been added. It follows the design of the
original EEP-16, only changing the name from `is_between` to `is_integer`.
This BIF takes in 3 parameters, `Term`, `LowerBound`, and `UpperBound`.
It returns `true` if `Term`, `LowerBound`, and `UpperBound` are all integers,
and `LowerBound =< Term =< UpperBound`; otherwise, it returns false.
Example:
1> I = 42.
2> is_integer(I, 0, 100).
true
Own Id: OTP-19809
Related Id(s): PR-10276
*** HIGHLIGHT ***
- Calls to `trace:info(_, {M,F,A}, Item)`, with `Item` as `call_time`,
`call_memory`, or `all`, will no longer block all scheduler threads from
running.
Own Id: OTP-19811
Related Id(s): PR-10207
- Full support for SCTP in `socket`. Not (yet) supported for FreeBSD.
Own Id: OTP-19834
- In the default code path for the Erlang system, the current working directory
(`.`) is now in the last position instead of the first.
Own Id: OTP-19842
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- Tools such as the debugger, `beam_lib`, and `xref` no longer support BEAM
files created before OTP 13B.
Own Id: OTP-19906
Related Id(s): PR-10519
- Optimized ETS named table lookup scalability by replacing read locks with
lockless atomic operations.
Own Id: OTP-19919
Related Id(s): PR-7118
- Removed the undocumented `dyn_erl` utility.
Own Id: OTP-19933
Related Id(s): PR-10573
- Added zstd:flush/2 for flushing compressed data without closing the
compression context.
Own Id: OTP-19936
Related Id(s): GH-10345, PR-10511
- While the iteration order for maps is undefined, it is now guaranteed that all
ways of iterating over maps provides the elements in the same order. That is,
all of the following ways of iterating will produce the elements in the same
order:
- maps:keys/1
- maps:values/1
- maps:to_list/1
- `maps:to_list(maps:iterator(M))`
- Map comprehension: `{K,V} || K := V <- M`
Own Id: OTP-19963
Related Id(s): PR-10626
*** HIGHLIGHT ***
- Improved the performance of code loading.
Own Id: OTP-19966
Related Id(s): PR-10615
- Changed ets:update_counter/4 and ets:update_element/4 to _always_ reject
default tuples smaller than the `keypos` of the table. Such keyless tuples are
now rejected even if the key exists in the table and the default tuple would
not be used. This is a subtle semantic change but is a nicer behavior for
development and testing as it will detect faulty default tuple arguments
earlier.
Own Id: OTP-19975
Related Id(s): PR-10674
*** POTENTIAL INCOMPATIBILITY ***
- Improved compatibility with systems that lack certain shell utilities.
Own Id: OTP-20002
Related Id(s): PR-10647
- It was previously not possible to check on the socket nif load result. A
successful load was self-evident, but a failure was only visible from the fact
that most `socket` functions failed with `notsup`. This has now been
improved such that the (socket nif) load result is visible in the info map
(from socket:info/0).
Own Id: OTP-20003
- The default for the `configure` option
`--{enable,disable}-use-embedded-3pp-alternatives` has changed and the
subset of embedded third-party products (_3pps_) affected by it has also
changed. Currently this option affects `zstd`, `zlib`, `ryu` (with `STL`). By
default `zstd` and `zlib` available on the OS will be used if they fulfill the
requirements. The builtin `ryu` (with `STL`) will be used by default. The 3pps
`openssl` and `tcl` that previously were present have been replaced by our own
implementations.
Requirements for the affected 3pps alternatives are still the same as before:
- `zstd` - Static library and include files of at least version 1.5.6 needs to
be available.
- `zlib` - Library and include files of at least version 1.2.5 needs to be
available.
- `ryu` (with `STL`) - A usable C++ compiler with C++17 library support.
Own Id: OTP-20013
Related Id(s): PR-10894, PR-10986, OTP-20106
- Added support for socket functions `recvmmsg()` and `sendmmsg()`.
Own Id: OTP-20015
Related Id(s): PR-10564
*** HIGHLIGHT ***
- There is a new NIF function `enif_term_size()`.
Own Id: OTP-20016
Related Id(s): PR-10782
- Call trace match specs can use `Arg1, Arg2 | '_'` syntax to match functions
with at least N number of arguments.
Own Id: OTP-20017
Related Id(s): PR-10754
- Replaced embedded OpenSSL MD5 implementation.
Own Id: OTP-20045
Related Id(s): PR-10870
- The format of the debug information stored by the `beam_debug_info` option
(used by the edb debugger) has been updated to more easily extendible and to
contain more information about call targets. (See the linked PR for more
details.)
Own Id: OTP-20048
Related Id(s): PR-9814
- There are new functions `erlang:exit_signal/2,3` replacing the old
`erlang:exit/2,3`. The primary purpose is better naming to distinguish between
exit _exceptions_ and exit _signals_. The new `exit_signal` functions will
also avoid a historical quirk when a process sends an exit signal to itself
with reason `normal`.
The old `erlang:exit/2,3` will work as before, but it is recommended to use
the new `exit:signal/2,3` functions for new or modified code. Deprecation of
`erlang:exit/2,3` with a compiler warning is planned for OTP 30.
Own Id: OTP-20069
Related Id(s): PR-10801
- The old Tcl-based implementation of `erl_errno_id()` has been replaced by our
own implementation now supporting more `errno` values on modern operating
systems. It also returns the string `"errno_<ERRNO_INTEGER>"` corresponding to
the integer given as argument if the `errno` integer is unknown instead of as
previously just return the string `"unknown"`.
The result of `erl_errno_id()` is often converted into an atom and passed as
an error from a driver or a NIF.
Own Id: OTP-20076
Related Id(s): PR-10958, PR-10969
*** POTENTIAL INCOMPATIBILITY ***
- The runtime system now supports generating encrypted crash dumps. See the
description of `--enable-encrypted-crash-dumps` in [Building and Installing
Erlang/OTP].
Own Id: OTP-20085
Related Id(s): PR-10993
*** HIGHLIGHT ***
- When implementing an alternate distribution implementors can now use an
alternate *handshake complete* fun of arity 4 if needed.
Own Id: OTP-20090
Related Id(s): PR-10478
- The erlang:suspend_process/1 and erlang:suspend_process/2 BIFs now also
suspend BIF timers that will send messages to the process if the timer was
created using the PID of the process as destination. Timers created using
registered names are not affected.
Own Id: OTP-20095
Related Id(s): PR-10619, PR-11004
*** POTENTIAL INCOMPATIBILITY ***
- Added support for socket option SO_TIMESTAMPNS (not available on all
platforms).
Own Id: OTP-20115
Related Id(s): PR-10929
> #### Full runtime dependencies of erts-17.0
>
> kernel-9.0, sasl-3.3, stdlib-4.1
# et-1.8
## Improvements and New Features
- Only minor internal changes.
Own Id: OTP-19964
> #### Full runtime dependencies of et-1.8
>
> erts-9.0, kernel-5.3, runtime_tools-1.10, stdlib-3.4, wx-1.2
# eunit-2.11
## Improvements and New Features
- Added `randomDelay` macro.
Own Id: OTP-19997
Related Id(s): PR-10614
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of eunit-2.11
>
> erts-9.0, kernel-11.0, stdlib-6.0
# ftp-1.2.5
## Fixed Bugs and Malfunctions
- The `odbc` application is now deprecated and is planned to be removed in
Erlang/OTP 30.
The `ftp` and `ct_ftp` modules are now deprecated and are planned to be
removed in Erlang/OTP 30.
Own Id: OTP-19980
Related Id(s): PR-10804
*** HIGHLIGHT ***
> #### Full runtime dependencies of ftp-1.2.5
>
> erts-7.0, kernel-6.0, runtime_tools-1.15.1, ssl-10.2, stdlib-3.5
# inets-9.7
## Fixed Bugs and Malfunctions
- A call to httpd:reload_config/2 now validates the new configuration before
removing the old one, leaving the server running in case of faulty config,
instead of putting it in an unrecoverable state.
Own Id: OTP-20128
Related Id(s): ERIERL-1314, PR-11079
## Improvements and New Features
- A new option `max_connections_open` has been added to the `httpc` HTTP
client profile configuration. It limits the maximum number of concurrent HTTP
handler processes that can be open simultaneously.
When the limit is reached, new requests are queued internally and started
automatically as existing handlers complete. This prevents bandwidth
exhaustion in high-load scenarios where too many parallel connections cause
remote servers to close sockets before transfers finish (the
socket_closed_remotely error).
The option can be set via
`httpc:set_options({max_connections_open, 10}, Profile).`
The default value is `infinity` (unlimited), preserving backward
compatibility. The value must be a positive integer or `infinity` and must be
greater than or equal to `max_sessions`.
Own Id: OTP-19587
Related Id(s): GH-8841, PR-9712
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The `mod_cgi` and `mod_actions` modules are now deprecated and are scheduled
to be removed in OTP 30.
Own Id: OTP-20071
Related Id(s): PR-10950
- There is a new Hardening guide with advice for configuring Inets to be more
secure.
Own Id: OTP-20133
Related Id(s): PR-11073
*** HIGHLIGHT ***
> #### Full runtime dependencies of inets-9.7
>
> erts-14.0, kernel-9.0, mnesia-4.12, public_key-1.13, runtime_tools-1.8.14,
> ssl-9.0, stdlib-5.0, stdlib-6.0
# jinterface-1.16
## Improvements and New Features
- The `jinterface` build now honors `SOURCE_DATE_EPOCH` for deterministic build
of `OtpErlang.jar`.
Own Id: OTP-19956
Related Id(s): PR-10556
- Removed prebuilt java files from source tar file to avoid issues with
different version of the java runtime.
Own Id: OTP-20073
Related Id(s): PR-10951
# kernel-11.0
## Fixed Bugs and Malfunctions
- Fixed (`inet`) module selection when calling (`gen_tcp`) listen and connect
and (`gen_udp`) open. Depending on the order of the options, the module option
(`tcp_module` or `udp_module`) was sometimes ignored.
Own Id: OTP-19695
Related Id(s): GH-9822, PR-10013
*** POTENTIAL INCOMPATIBILITY ***
- The TCP/UDP compatibility layer has been fixed so that `inet_backend = socket`
now supports socket options `reuseport` and `reuseport_lb` for `gen_tcp` and
`gen_udp`.
Own Id: OTP-19917
Related Id(s): PR-10514
- Some errors in config files for the application controller would result in
very cryptic crashes. Error handling has been improved to ensure that the file
name and line number of the offending token are now printed.
Own Id: OTP-20054
Related Id(s): GH-10214, PR-10259
- The TOS handling on socket has been significantlyupdated and improved. Socket
did not properly handle set, get and recv (cmsg) of TOS.
Note that the returned TOS value has been changed. It was previously an atom
or an integer. Now it is a map with different interpretations of the TOS
octet. See the documentation.
Own Id: OTP-20102
Related Id(s): GH-10968, PR-11059
*** POTENTIAL INCOMPATIBILITY ***
- Replaced a sleep clause in user_drv shutdown with a flush of the output
buffer.
Own Id: OTP-20124
Related Id(s): PR-10808
## Improvements and New Features
- Added an option to set the `erl_boot_server` listen port.
Own Id: OTP-19708
Related Id(s): PR-9894
- The memory footprint of some supervisors has been reduced by purging obsoleted
data when the supervisor is transitioning to and from hibernation.
Own Id: OTP-19713
Related Id(s): PR-9866
- Improved name consistency of EPMD protocol messages in documentation and code.
Renamed `PORT_PLEASE2_REQ` to `PORT2_REQ` and added prefix `EPMD_`.
Own Id: OTP-19734
Related Id(s): GH-10071, PR-10078
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Refactored a `kernel_load_completed` clause in the `init` module for
conciseness.
Own Id: OTP-19786
Related Id(s): PR-10134
- Full support for SCTP in `socket`. Not (yet) supported for FreeBSD.
Own Id: OTP-19834
- In the default code path for the Erlang system, the current working directory
(`.`) is now in the last position instead of the first.
Own Id: OTP-19842
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- It was previously not possible to check on the socket nif load result. A
successful load was self-evident, but a failure was only visible from the fact
that most `socket` functions failed with `notsup`. This has now been
improved such that the (socket nif) load result is visible in the info map
(from socket:info/0).
Own Id: OTP-20003
- Added support for socket functions `recvmmsg()` and `sendmmsg()`.
Own Id: OTP-20015
Related Id(s): PR-10564
*** HIGHLIGHT ***
- Added a new module called `io_ansi` that allows the user to emit Virtual
Terminal Sequences (a.k.a. ANSI sequences) to the terminal in order to add
colors/styling to text or create fully-fledged terminal applications.
`io_ansi` uses the local terminfo database in order to be as cross-platform
compatible as possible.
It also works across nodes so that if functions on a remote node call
io_ansi:fwrite/1 it will use the destination terminal's terminfo database to
determine which sequences to emit. In practice, this means that you can call
functions in a remote shell session that use `io_ansi` and it will properly
detect the terminal sequences the target terminal can handle and will print
using them correctly.
Own Id: OTP-20028
Related Id(s): PR-10905, PR-9940
*** HIGHLIGHT ***
- Polished the documentation groups, essentially removed groups that did nothing
but obscure the documentation.
Own Id: OTP-20029
Related Id(s): PR-10755
- Added a new behavior, `data_publisher`, for building eventually consistent,
replicated data stores across distributed nodes. This is a generalization of
the `pg` module.
Own Id: OTP-20055
Related Id(s): PR-10426
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- When implementing an alternate distribution implementors can now use an
alternate *handshake complete* fun of arity 4 if needed.
Own Id: OTP-20090
Related Id(s): PR-10478
- Added support for socket option SO_TIMESTAMPNS (not available on all
platforms).
Own Id: OTP-20115
Related Id(s): PR-10929
- Added a flag `log_missed_net_ticks = true | false` that controls whether a
warning is logged for each missed sub-tick on a distribution connection. A
sub-tick is missed when no data has been received from a connected node during
one tick interval. A warning is emitted on every subsequent missed sub-tick
until the node is declared down after `net_tickintensity` consecutive missed
sub-ticks, at which point a final timeout warning is always logged regardless
of this setting. Defaults to `false`.
Own Id: OTP-20117
Related Id(s): PR-11031
> #### Full runtime dependencies of kernel-11.0
>
> crypto-5.8, erts-17.0, sasl-3.0, stdlib-8.0
# megaco-4.9
## Fixed Bugs and Malfunctions
- Running Dialyzer on Windows in an Erlang repo, causes Dialyzer warnings for
the megaco_flex_scanner module. This is because the flex scanner is not built
on Windows. These warnings are now suppressed.
Own Id: OTP-20114
Related Id(s): PR-11025
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of megaco-4.9
>
> asn1-3.0, debugger-4.0, erts-12.0, et-1.5, kernel-8.0, runtime_tools-1.8.14,
> stdlib-2.5
# mnesia-4.26
## Improvements and New Features
- `mnesia` now has new functions `select_reverse/1-6` supporting iteration over
tables in reverse order.
Own Id: OTP-19611
Related Id(s): GH-8993, PR-9475
- The `mnesia_registry` module has been removed.
Own Id: OTP-19807
Related Id(s): PR-7315
*** POTENTIAL INCOMPATIBILITY ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of mnesia-4.26
>
> erts-9.0, kernel-5.3, stdlib-5.0
# observer-2.19
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of observer-2.19
>
> erts-15.0, et-1.5, kernel-10.0, runtime_tools-2.1, stdlib-5.0, wx-2.3
# odbc-2.17
## Fixed Bugs and Malfunctions
- The `odbc` application is now deprecated and is planned to be removed in
Erlang/OTP 30.
The `ftp` and `ct_ftp` modules are now deprecated and are planned to be
removed in Erlang/OTP 30.
Own Id: OTP-19980
Related Id(s): PR-10804
*** HIGHLIGHT ***
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of odbc-2.17
>
> erts-6.0, kernel-3.0, stdlib-2.0
# os_mon-2.12
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of os_mon-2.12
>
> erts-14.0, kernel-9.0, sasl-4.2.1, stdlib-5.0
# parsetools-2.8
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of parsetools-2.8
>
> erts-6.0, kernel-3.0, stdlib-3.4
# public_key-1.21
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Added an option for relaxed encoding of certificates to allow some values to
be empty. This may be used by other applications for interoperability reasons.
This option is not used by the `ssl` application.
Own Id: OTP-19822
Related Id(s): PR-10033
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The runtime system now supports generating encrypted crash dumps. See the
description of `--enable-encrypted-crash-dumps` in [Building and Installing
Erlang/OTP].
Own Id: OTP-20085
Related Id(s): PR-10993
*** HIGHLIGHT ***
> #### Full runtime dependencies of public_key-1.21
>
> asn1-5.0, crypto-5.8, erts-13.0, kernel-8.0, stdlib-4.0
# reltool-1.1
## Improvements and New Features
- Removed the undocumented `dyn_erl` utility.
Own Id: OTP-19933
Related Id(s): PR-10573
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of reltool-1.1
>
> erts-15.0, kernel-9.0, sasl-4.2.1, stdlib-5.0, tools-2.6.14, wx-2.3
# runtime_tools-2.4
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of runtime_tools-2.4
>
> erts-16.0, kernel-10.0, mnesia-4.12, stdlib-6.0
# sasl-4.4
## Fixed Bugs and Malfunctions
- UNC paths are now handled on Windows.
Own Id: OTP-19949
Related Id(s): PR-10601
## Improvements and New Features
- Removed the undocumented `dyn_erl` utility.
Own Id: OTP-19933
Related Id(s): PR-10573
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of sasl-4.4
>
> erts-15.0, kernel-6.0, stdlib-4.0, tools-2.6.14
# snmp-5.20.3
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
> #### Full runtime dependencies of snmp-5.20.3
>
> asn1-5.4, crypto-4.6, erts-12.0, kernel-8.0, mnesia-4.12,
> runtime_tools-1.8.14, stdlib-5.0
# ssh-6.0
## Fixed Bugs and Malfunctions
- Password-based authentication has been updated to follow current security best
practices. Key-based authentication remains recommended for production
systems.
Own Id: OTP-19982
Related Id(s): PR-10571
- Added explicit size validation guards for pre-authentication SSH messages to
improve defense-in-depth against DoS attacks. Messages now have per-field size
limits based on RFC specifications:
- Transport layer messages (DISCONNECT, IGNORE, DEBUG)
- Key exchange messages (DH, ECDH, DH-GEX)
- Service request messages (SERVICE_REQUEST, SERVICE_ACCEPT, EXT_INFO)
This change enhances the existing 256KB global packet size limit with granular
per-message validation. Compliant implementations are not affected.
Own Id: OTP-19995
Related Id(s): PR-10739
*** POTENTIAL INCOMPATIBILITY ***
- The SFTP subsystem `root` option now properly rejects relative paths at daemon
startup. Previously, relative paths would cause unpredictable behavior as file
operations resolved relative to the Erlang VM's current working directory. The
option now requires an absolute path or empty string.
Own Id: OTP-20019
Related Id(s): PR-10820
*** POTENTIAL INCOMPATIBILITY ***
- Dynamic atom creation has been replaced with static lookups in `ssh_transport`
and `ssh_connection`, using a dedicated OID-to-algorithm mapping function in
`ssh_message`.
Own Id: OTP-20127
Related Id(s): PR-11078
## Improvements and New Features
- Using KEX strict extension names as specified in
draft-ietf-sshm-strict-kex-00. Pre standard names are still supported.
Own Id: OTP-19709
Related Id(s): PR-10115
- Added an `alive` option to detect and terminate dead SSH connections.
Functionally equivalent to OpenSSH's ClientAlive*/ServerAlive* settings.
Own Id: OTP-19750
Related Id(s): PR-10372, PR-9125
- `ssh:stop_deamon` now uses `supervisor:stop` for shutting down daemons. With
this change, the scenario when `ssh:stop_daemon` is called for a non-existing
process results in calling process exiting. Previously an error tuple was
returned (which was not documented).
Own Id: OTP-19801
Related Id(s): PR-10253
*** POTENTIAL INCOMPATIBILITY ***
- The default key exchange algorithm is now mlkem768x25519-sha256, a hybrid
quantum-resistant algorithm combining ML-KEM-768 with X25519. This provides
protection against both classical and quantum computer attacks while
maintaining backward compatibility through automatic fallback to other
algorithms when peers don't support it.
Own Id: OTP-19965
Related Id(s): PR-10656
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- The SSH daemon now defaults to disabled for shell and exec services,
implementing the "secure by default" principle. This prevents authenticated
users from executing arbitrary Erlang code unless explicitly configured.
Applications requiring shell or exec functionality must now explicitly enable:
%% Enable Erlang shell
ssh:daemon(Port, [{shell, {shell, start, []}} | Options])
%% Enable Erlang term evaluation via exec
ssh:daemon(Port, [{exec, erlang_eval} | Options])
%% Restore complete old behavior
ssh:daemon(Port, [{shell, {shell, start, []}},
{exec, erlang_eval}
| Options])
Own Id: OTP-19969
Related Id(s): ERIERL-1319, PR-10970, PR-11080
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- Added SFTP resource limits section to hardening guide covering `max_handles`,
`max_path`, and `max_files` with deployment recommendations.
Own Id: OTP-20031
Related Id(s): PR-10838
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The SFTP subsystem is no longer enabled by default when starting an SSH
daemon. To enable it, add the subsystems option explicitly:
ssh:daemon(Port, [{subsystems, [ssh_sftpd:subsystem_spec([])]} | Options])
Own Id: OTP-20078
Related Id(s): PR-10970
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- The SSH hardening guide has been improved with a timeout overview table
replacing the previous image, corrected terminology ("authenticated" instead
of "authorized"), and new examples for loopback binding, public key user
checking, and password lockout using ETS.
Own Id: OTP-20079
Related Id(s): PR-10970
- With this change usage of `zlib` compression algorithm in SSH is deprecated
and scheduled for removal in OTP 30.0
Own Id: OTP-20099
Related Id(s): PR-11010
- Updated SSH documentation with current OTP 29 algorithm defaults, including
the new mlkem768x25519-sha256 post-quantum key exchange. Fixed stale examples,
typos, and improved document structure.
Own Id: OTP-20100
Related Id(s): PR-11012
> #### Full runtime dependencies of ssh-6.0
>
> crypto-5.7, erts-14.0, kernel-10.3, public_key-1.6.1, runtime_tools-1.15.1,
> stdlib-8.0
# ssl-11.7
## Fixed Bugs and Malfunctions
- Add missing clauses to ssl_handshake:extension_value/1. If an hello extension,
missing a handling clause was present in a paused handshake, the handshake
would fail.
Own Id: OTP-20116
Related Id(s): GH-11030, PR-11062
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The post-quantum hybrid algorithm x25519mlkem768 is now the most preferred key
exchange group in the default configuration.
Post-quantum hybrid algorithms secp384r1mlkem1024 and secp256r1mlkem768 are
supported but have to be configured. The same goes for the plain post-quantum
algorithms mlkem1024, mlkem768, and mlkem512.
The most preferred signature algorithms is now post-quantum algorithms ML-DSA
followed by the fastest SLH-DSA (slh_dsa_sha2_256f) algorithm, if such a
certificate is available in the configuration. Other SLH-DSA variants are also
supported but are added to the end of the preferred list.
All these algorithms were available in OTP-28.4 but none of them were
preferred and some of them changed default status.
Own Id: OTP-20070
Related Id(s): PR-10949
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- Secure renegotiation for TLS-1.2 specified in RFC 5746 from 2010 is now always
used. The interoperability fallback option
`{secure_renegotiate,SecureRenegotiate}` is no longer needed.
Own Id: OTP-20080
Related Id(s): PR-10979
*** POTENTIAL INCOMPATIBILITY ***
- There is a new Hardening guide giving guidelines on how to strengthen the
security for the `ssl` application.
Own Id: OTP-20087
Related Id(s): PR-11019
*** HIGHLIGHT ***
> #### Full runtime dependencies of ssl-11.7
>
> crypto-5.8, erts-16.0, inets-5.10.7, kernel-10.3, public_key-1.20.3,
> runtime_tools-1.15.1, stdlib-7.0
# stdlib-8.0
## Fixed Bugs and Malfunctions
- Fixed an issue in digraph_utils:roots/1 where roots could be missed in some
cases.
Own Id: OTP-19932
Related Id(s): PR-10510
- beam_lib:strip/1 will now retain the Beam debug information chunk produced
by the `beam_debug_info` option. The chunk will also be retained when combing
the `beam_debug_info` option with the undocumented `slim` option.
The runtime system will no longer crash when attempting to load modules that
have been compiled with `beam_debug_info` but lack the actual Beam debug info
chunk.
Own Id: OTP-19991
Related Id(s): GH-10557, PR-10735
- Fixed a crash when zstd:compress/2 was asked to compress empty data.
Own Id: OTP-20001
Related Id(s): GH-10650, PR-10653
- Replaced a sleep clause in user_drv shutdown with a flush of the output
buffer.
Own Id: OTP-20124
Related Id(s): PR-10808
- The calendar:seconds_to_time/1 function now checks the range for each of the
components of a time tuple (`{Hours,Minutes,Seconds}`) and fail with an
exception if a component is out of range.
Own Id: OTP-20125
Related Id(s): PR-11069
## Improvements and New Features
- Error return values from functions in `zip` now also specify which file in
the archive the error belongs to.
Own Id: OTP-19663
Related Id(s): PR-9899
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- The undocumented and unsupported function lists:zf/2 is now deprecated.
Own Id: OTP-19783
Related Id(s): PR-10161
- Native records as described in EEP-79 has been implemented.
A native record is a data structure similar to the traditional tuple-based
records, except that is a true data type.
Native records are considered experimental in Erlang/OTP 29 and possibly also
in Erlang/OTP 30, meaning that their behavior may change, potentially
requiring updates to applications that use them.
Own Id: OTP-19785
Related Id(s): PR-10617
*** HIGHLIGHT ***
- The new `supervior:stop/1,2` functions can be used to manage the dynamic parts
of a supervisor tree in an application from outside the tree but in the same
application.
Own Id: OTP-19800
Related Id(s): PR-9209
- Added a new constructor array:from/2.
Own Id: OTP-19815
Related Id(s): PR-10304
- There are new functions for random permutation of a list: rand:shuffle/1 and
rand:shuffle_s/2. They are inspired by a suggestion and discussion on
ErlangForums.
Own Id: OTP-19826
Related Id(s): PR-10281
*** HIGHLIGHT ***
- The undocumented functions erl_eval:extended_parse_exprs/1 and
erl_eval:extended_parse_term/1 will now be faster when called with a long
list of tokens. (These functions are used by `qlc` and the shell.)
Own Id: OTP-19838
Related Id(s): PR-10338
- The `unicode` module now supports the Unicode 17 standard.
Own Id: OTP-19853
Related Id(s): PR-10382
- Added functions to `unicode` for recognizing whitespaces and identifiers.
Own Id: OTP-19858
Related Id(s): PR-10387
- The rand:bytes/1 and rand:bytes_s/2 functions have been optimized by
implementing a new internal callback function that crypto:rand_seed_alg/1
and crypto:alg_seed_alg_s/1 have been updated to use.
A new algorithm `crypto_prng1`, which also takes advantage of this new
internal callback, has been added to crypto:rand_seed_alg/2 and
crypto:rand_seed_alg_s/2. It is much faster then the existing `crypto_aes`,
in particular for generating bytes.
Own Id: OTP-19882
Related Id(s): PR-10453, OTP-19827
- There will now be a warning when exporting variables out of a subexpression.
For example:
case file:open(File, AllOpts = [write,{encoding,utf8}]) of
{ok,Fd} ->
{Fd,AllOpts}
end
To avoid the warning, this can be rewritten to:
AllOpts = [write,{encoding,utf8}],
case file:open(File, AllOpts) of
{ok,Fd} ->
{Fd,AllOpts}
end
The warning can be suppressed by giving option `nowarn_export_var_subexpr` to
the compiler.
Own Id: OTP-19898
Related Id(s): PR-9134
*** HIGHLIGHT ***
- There are new functions in the shell for returning process information.
The `pi/1` function is shortcut for erlang:process_info/1. The `pi/3`
function takes the three numbers from a pid, constructs a pid, and calls
`process_info/1`.
Examples:
1> pi(<0.90.0>).
[{current_function,{c,pinfo,1}},
{initial_call,{erlang,apply,2}},
{status,running},
...
2> pi(0, 90, 0).
[{current_function,{c,pinfo,1}},
{initial_call,{erlang,apply,2}},
{status,running},
...
Own Id: OTP-19903
Related Id(s): PR-10422
- Tools such as the debugger, `beam_lib`, and `xref` no longer support BEAM
files created before OTP 13B.
Own Id: OTP-19906
Related Id(s): PR-10519
- The `calendar` module has been updated to use the much faster than before
Neri-Schneider algorithm for Gregorian calendar calculations, and been
extended to handle negative years.
Own Id: OTP-19912
Related Id(s): PR-10449
- `graph` is a new module that is a functional equivalent of the `digraph` and
`digraph_utils` modules.
Own Id: OTP-19922
Related Id(s): PR-10532
*** HIGHLIGHT ***
- Before Erlang/OTP 29, attempting to bind variables in a comprehension would
compile successfully but fail at runtime. Example:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
* exception error: bad filter 2614250
In Erlang/OTP 29, attempting to bind a variable in a comprehension will fail
by default:
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
* 5:14: matches using '=' are not allowed in comprehension qualifiers
unless the experimental 'compr_assign' language feature is enabled.
With 'compr_assign' enabled, a match 'P = E' will behave as a
strict generator 'P <-:- [E]'."
However, this example will work as expected if the `compr_assign` feature is
enabled when starting the runtime system:
$ erl -enable-feature compr_assign
. . .
1> fh(List) -> [H || E <- List, H = erlang:phash2(E), H rem 10 =:= 0].
ok
2> fh(lists:seq(1, 10)).
[2614250]
Here is another example how `compr_assign` can be used:
-module(example).
-feature(compr_assign, enable).
-export([cat/1]).
cat(Files) ->
[Char || F <- Files,
{ok, Bin} = file:read_file(F),
Char <- unicode:characters_to_list(Bin)].
Own Id: OTP-19927
Related Id(s): PR-9153
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- Removed the undocumented `dyn_erl` utility.
Own Id: OTP-19933
Related Id(s): PR-10573
- The functions erl_tar:add/3 and erl_tar:add/4 now accepts the
`{mode,Mode}` option for setting the permission of the file.
Own Id: OTP-19934
Related Id(s): PR-10524
- Added zstd:flush/2 for flushing compressed data without closing the
compression context.
Own Id: OTP-19936
Related Id(s): GH-10345, PR-10511
- There will now be a warning when using the `catch` operator, which has been
deprecated for a long time.
It is recommended to instead use `try`...`catch`...`end` but is also possible
to disable the warning by using the `nowarn_deprecated_catch` option.
Own Id: OTP-19938
Related Id(s): PR-10421
*** HIGHLIGHT ***
- Multi-valued comprehensions according to EEP 78 has been implemented.
Example:
> [I, -I || I <- lists:seq(1, 5)].
[1,-1,2,-2,3,-3,4,-4,5,-5]
Own Id: OTP-19942
Related Id(s): PR-9374
*** HIGHLIGHT ***
- There will now be a warning for matches that unify constructors, such as the
following:
m({a,B} = {Y,Z}) -> . . .
Such a match can be rewritten to:
m({a=Y,B=Y}) -> . . .
The compiler option `nowarn_match_alias_pats` can be used to disable the
warning.
Own Id: OTP-19943
Related Id(s): PR-10433
*** HIGHLIGHT ***
- While the iteration order for maps is undefined, it is now guaranteed that all
ways of iterating over maps provides the elements in the same order. That is,
all of the following ways of iterating will produce the elements in the same
order:
- maps:keys/1
- maps:values/1
- maps:to_list/1
- `maps:to_list(maps:iterator(M))`
- Map comprehension: `{K,V} || K := V <- M`
Own Id: OTP-19963
Related Id(s): PR-10626
*** HIGHLIGHT ***
- The `array` module have been extended with several new functions. The internal
representation have been changed to allow the new functionality and
optimizations. Arrays serialized with `term_to_binary/1` in previous releases
are not compatible.
Own Id: OTP-20004
Related Id(s): PR-10578
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- `m:erl_tar` will use less memory when extracting large tar entries to disk.
Instead of reading each tar entry into memory, `erl_tar` will now stream
data in chunks of 64KB. The chunk size is settable using the new
`{chunks,ChunkSize}` option.
The new `{max_size,Size}` option will set a limit on the total size of
extracted data to protect against filling up the disk.
Checking of symlinks has been improved. Some symlinks that were safe (such as
`dir/link -> ../file`) used to be rejected.
Own Id: OTP-20023
Related Id(s): PR-10814, PR-10818, PR-10821
*** HIGHLIGHT ***
- Added a new module called `io_ansi` that allows the user to emit Virtual
Terminal Sequences (a.k.a. ANSI sequences) to the terminal in order to add
colors/styling to text or create fully-fledged terminal applications.
`io_ansi` uses the local terminfo database in order to be as cross-platform
compatible as possible.
It also works across nodes so that if functions on a remote node call
io_ansi:fwrite/1 it will use the destination terminal's terminfo database to
determine which sequences to emit. In practice, this means that you can call
functions in a remote shell session that use `io_ansi` and it will properly
detect the terminal sequences the target terminal can handle and will print
using them correctly.
Own Id: OTP-20028
Related Id(s): PR-10905, PR-9940
*** HIGHLIGHT ***
- Polished the documentation groups, essentially removed groups that did nothing
but obscure the documentation.
Own Id: OTP-20029
Related Id(s): PR-10755
- The gb_sets:from_ordset/1 and gb_trees:from_orddict/1 functions would
trust their inputs. If the input contained duplicates or was not properly
sorted, the resulting gb_set or gb_tree would be invalid, and any number of
interesting problems could occur.
In this release, these functions will raise an exception if their input is not
valid. That could mean that incorrect programs that **seemed** to work could
now stop working altogether.
There is also a new gb_trees:from_list/1 function for directly creating a
gb_tree from a list.
Own Id: OTP-20061
Related Id(s): PR-10910
*** POTENTIAL INCOMPATIBILITY ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The `json` module now encodes and decodes quoted strings faster.
Improvements of up to 55 percent has been measured when decoding JSON data
with long strings.
The string:length/1, string:slice/2, and string:slice/3 functions have
been optimized. For some strings, they can be up to twice as fast.
Own Id: OTP-20072
Related Id(s): PR-10938, PR-10948
*** HIGHLIGHT ***
> #### Full runtime dependencies of stdlib-8.0
>
> compiler-5.0, crypto-4.5, erts-16.0.3, kernel-11.0, sasl-3.0,
> syntax_tools-3.2.1
# syntax_tools-4.1
## Fixed Bugs and Malfunctions
- merl:compile_and_load/1 could crash when compiling code containing comments.
merl:quote/2 would fail to handle literal UTF-8 encoded binaries.
Own Id: OTP-20077
Related Id(s): PR-10243, PR-10962
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- Multi-valued comprehensions according to EEP 78 has been implemented.
Example:
> [I, -I || I <- lists:seq(1, 5)].
[1,-1,2,-2,3,-3,4,-4,5,-5]
Own Id: OTP-19942
Related Id(s): PR-9374
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of syntax_tools-4.1
>
> compiler-9.0, erts-16.0, kernel-10.3, stdlib-8.0
# tftp-1.3
## Improvements and New Features
- The legacy `and` and `or` operators have been replaced with other language
constructs.
Own Id: OTP-19744
Related Id(s): PR-10114, PR-10554, PR-10568, PR-10579, PR-10580,
PR-10585, PR-10598, PR-10710, PR-10718, PR-10730
- All use of legacy `catch` in the TFTP application has been rewritten.
In the process, deep return using `exit/1` or `throw/1` from callbacks has
been changed to only work with `throw/1`, as customary. This was considered a
misfeature.
Explicit loading of callback module or logger module has been removed, since
that was against what one would expect for embedded mode.
Own Id: OTP-19996
Related Id(s): PR-10753
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of tftp-1.3
>
> erts-6.0, kernel-6.0, stdlib-5.0
# tools-4.2
## Fixed Bugs and Malfunctions
- Fixed "unbalanced parenthesis" issue when pressing TAB in emacs erlang shell.
Own Id: OTP-19921
Related Id(s): GH-8569, PR-10642
- The minimum supported Emacs version for `erlang-mode` has been raised from
24.3 to 27.1. Compatibility shims for older Emacs versions have been removed.
The `erlang-mode` package version now tracks the Erlang/OTP release version
(29.0) for consistent version numbers across package managers.
Own Id: OTP-20059
Related Id(s): PR-10892
## Improvements and New Features
- Tools such as the debugger, `beam_lib`, and `xref` no longer support BEAM
files created before OTP 13B.
Own Id: OTP-19906
Related Id(s): PR-10519
- The `ignore_xref` attribute has been handled as a post-analysis filter by
build tools such as Rebar3. In this release, `xref` itself does the
filtering, ensuring that all tooling that calls `xref` for any purpose can
rely on these declarations to just work.
Own Id: OTP-20032
Related Id(s): PR-10592
*** HIGHLIGHT ***
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
- The runtime system now supports generating encrypted crash dumps. See the
description of `--enable-encrypted-crash-dumps` in [Building and Installing
Erlang/OTP].
Own Id: OTP-20085
Related Id(s): PR-10993
*** HIGHLIGHT ***
> #### Full runtime dependencies of tools-4.2
>
> compiler-8.5, crypto-5.9, erts-15.0, kernel-10.0, public_key-1.21,
> runtime_tools-2.1, stdlib-6.0
# wx-2.6
## Fixed Bugs and Malfunctions
- The examples for `wx` are now only installed in one place (in `doc/examples`).
Own Id: OTP-20119
Related Id(s): ERIERL-1315, PR-11032
## Improvements and New Features
- Documentation about how to validate the SBOM using sigstore has been added.
Own Id: OTP-19766
Related Id(s): GH-10151, PR-10187
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of wx-2.6
>
> erts-12.0, kernel-8.0, stdlib-5.0
# xmerl-2.2
## Improvements and New Features
- Added support for `-unsafe` attributes, which is used to mark functions as
unsafe to use.
This is similar to but separate from deprecation, and the compiler will by
default now generate warnings for calls to functions in Erlang/OTP that are
known to be always unsafe.
Furthermore, `xref` can now be used to find calls to functions in another
application that lack a `-doc` attribute (`undocumented_function_calls`),
calls to functions in another application marked `-doc false.`
(`private_function_calls`), as well as calls to unsafe functions
(`unsafe_function_calls`).
Own Id: OTP-20066
Related Id(s): PR-10839
*** HIGHLIGHT ***
> #### Full runtime dependencies of xmerl-2.2
>
> erts-6.0, kernel-8.4, stdlib-2.5
# Thanks to
Alexandre Rodrigues, Alex Mickelson, Andreas Hasselberg, Andrew Bennett, Ayanda
Dube, Bentheburrito, Bernhard M. Wiedemann, Bozhidar Batsov, Claes Nästén,
Daniel Gorin, Daniel Kukula, dependabotbot, Eksperimental, Eric
Meadows-Jönsson, erlang-bot-appbot, felipe stival, Fernando Areias, Holger
Weiß, Ievgen Pyrogov, Ilya Averyanov, ilya-klyuchnikov, Ilya Klyuchnikov, Jan
Uhlig, Jérôme de Bretagne, João Henrique Ferreira de Freitas, Johannes Christ,
Jonatan Männchen, José Valim, krishnadas, Loïc Hoguin, loscher, lud, Maria
Scott, Marko Mindek, matt, Mend Renovate, Michael Daniels, Michał Muskała,
Nelson Vides, Nick Vatamaniuc, Olexandr88, Paul Guyot, Paulo F. Oliveira, Paulo
Tomé, Petr Sumbera, Preet, Radek Szymczyszyn, Rasmus Précenth, Richard Carlsson,
Robert Ismo, Robin Morisset, Sam Weaver, Sébastien Saint-Sevin, Sergey Fedorov,
siiky, Simon Cornish, spoo, Stefan Grundmann, Takeru Ohta, Vadim Yanitskiy,
Vance Shipley, Wade Mealing, Wei Huang, williamthome, yagogarea, Zabrane, Zeyu
Zhang, наб
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