[erlang-bugs] Internal error in beam_type

[Anthony Ramine]

$ bin/erlc  +no_topt +export_all bug.erl
bug: function f/2+13:
  Internal consistency check failed - please report this bug.
  Instruction: {test,is_eq_exact,{f,1},[{x,5},{atom,true}]}
  Error:       {uninitialized_reg,{x,5}}:

-- 
Anthony Ramine

Le 8 mars 2014 à 02:57, Anthony Ramine <n.oxyde@REDACTED> a écrit :

> This doesn’t crash when disabling beam_bool:
> 
> 	bin/erlc +export_all +no_bopt bug.erl
> 
> That is the kind of reduction improvement that I could implement in your bug finding tool, if it was open source :)
> 
> -- 
> Anthony Ramine
> 
> Le 7 mars 2014 à 19:08, Ulf Norell <ulf.norell@REDACTED> a écrit :
> 
>> This one produces the same error
>> 
>> -module(bug).
>> f(M, [_]) when M#{a := 0, b => 0}, map_size(M) -> ok.
>> 
>> / Ulf
>> 
>> 
>> On Mon, Mar 3, 2014 at 9:08 AM, Ulf Norell <ulf.norell@REDACTED> wrote:
>> This is my favourite so far.
>> 
>> -module(bug).
>> f(X, [_]) when {{X}}, -X -> ok.
>> 
>> $ erl
>> Erlang/OTP 17 [RELEASE CANDIDATE 2] [erts-6.0] [source-a74e66a] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]
>> 
>> Eshell V6.0  (abort with ^G)
>> 1> c(bug).
>> Function: f/2
>> bug.erl: internal error in beam_type;
>> crash reason: {case_clause,{'EXIT',{{badmatch,false},
>>                      [{beam_utils,live_opt_block,4,
>>                                   [{file,"beam_utils.erl"},{line,785}]},
>>                       {beam_utils,live_opt,4,
>>                                   [{file,"beam_utils.erl"},{line,680}]},
>>                       {beam_utils,live_opt,1,
>>                                   [{file,"beam_utils.erl"},{line,207}]},
>>                       {beam_type,function,1,
>>                                  [{file,"beam_type.erl"},{line,33}]},
>>                       {beam_type,'-module/2-lc$^0/1-0-',1,
>>                                  [{file,"beam_type.erl"},{line,28}]},
>>                       {beam_type,module,2,[{file,"beam_type.erl"},{line,28}]},
>>                       {compile,'-select_passes/2-anonymous-2-',2,
>>                                [{file,"compile.erl"},{line,493}]},
>>                       {compile,'-internal_comp/4-anonymous-1-',2,
>>                                [{file,"compile.erl"},{line,290}]}]}}}
>> 
>>  in function  compile:'-select_passes/2-anonymous-2-'/2 (compile.erl, line 493)
>>  in call from compile:'-internal_comp/4-anonymous-1-'/2 (compile.erl, line 290)
>>  in call from compile:fold_comp/3 (compile.erl, line 308)
>>  in call from compile:internal_comp/4 (compile.erl, line 292)
>>  in call from compile:'-do_compile/2-anonymous-0-'/2 (compile.erl, line 153)
>> bug.erl:2: Warning: function f/2 is unused
>> error
>> 
>> / Ulf
>> 
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>