[erlang-bugs] Bug in qlc
Hans Bolinder
hans.bolinder@REDACTED
Fri Dec 8 08:47:20 CET 2006
[Daniel Luna:]
> See code below.
>
> qlc "A" works if you remove ", true".
>
> Both work if you remove disc_only_copies.
>
> This error occurs in R11B-2, but not in R11B-1.
Thanks for the bug report.
It seems that a modification in R11B-2 exposed a bug that has been
present for quite some time. The bug was triggered by the empty Dets
table, but could also show up when no object matches a given match
specification.
The following patch ensures that dets:match{_object}() and
dets:select() never return {[],Cont} which should solve the problem at
hand.
*** /usr/local/otp/releases/otp_beam_solaris8_r11b_patched/lib/stdlib-1.14.2/src/dets.erl Thu Nov 16 17:40:35 2006
--- dets.erl Wed Dec 6 12:43:19 2006
***************
*** 718,723 ****
--- 718,725 ----
false ->
badarg
end;
+ [] ->
+ chunk_match(NewState);
Terms ->
{Terms, NewState}
end;
The patch erl_898_otp_beam is available at the Licencees' Area
(http://www.erlang.se/lic_area/index.shtml).
Best regards,
Hans Bolinder, Erlang/OTP
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