http://d.puremagic.com/issues/show_bug.cgi?id=8596

           Summary: Indeterministic assertion failure in rehash
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: timon.gehr@gmx.ch


--- Comment #0 from timon.gehr@gmx.ch 2012-08-28 12:28:46 PDT ---
DMD 2.060

The following assertion failure occurs indeterministically:

dmd: ../ztc/aa.c:423: void AArray::rehash_x(aaA*, aaA**, size_t): Assertion `0'
failed.

The frequency seems to increase as project size grows.

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deadalnix <deadalnix@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |deadalnix@gmail.com


--- Comment #1 from deadalnix <deadalnix@gmail.com> 2012-09-02 08:03:16 PDT ---
It tend to become a serious problem to me.

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--- Comment #2 from timon.gehr@gmx.ch 2012-09-02 08:03:54 PDT ---
(In reply to comment #1)
> It tend to become a serious problem to me.

+1.

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla@digitalmars.com


--- Comment #3 from Walter Bright <bugzilla@digitalmars.com> 2012-11-12 11:50:58 PST ---
The assert happens when more than one item in the hash table has the same key. A hash table may only have one item per key.

It would be helpful if you could run it under linux or osx, compile dmd with -g, and get a stack trace.

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major


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deadalnix <deadalnix@gmail.com> changed:

           What    |Removed                     |Added
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           Severity|major                       |normal


--- Comment #4 from deadalnix <deadalnix@gmail.com> 2012-11-12 12:20:48 PST ---
(In reply to comment #3)
> The assert happens when more than one item in the hash table has the same key. A hash table may only have one item per key.
> 
> It would be helpful if you could run it under linux or osx, compile dmd with -g, and get a stack trace.

I fail to trigger the error when using gdb. Seems like gdb is influencing on what does trigger the error.

The error trigger as well when dmd is compiled with -g .

Looks like a race condition.

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--- Comment #5 from Walter Bright <bugzilla@digitalmars.com> 2012-11-12 12:39:20 PST ---
dmd isn't multithreaded, so it could not be a race condition.

It does, however, sound like memory corruption.

Can you run it under valgrind?

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--- Comment #6 from deadalnix <deadalnix@gmail.com> 2012-11-12 12:45:50 PST ---
(In reply to comment #5)
> dmd isn't multithreaded, so it could not be a race condition.
> 
> It does, however, sound like memory corruption.
> 
> Can you run it under valgrind?

Already tryed, but I don't have enough RAM on my machine to do so. Consider that compiling the project require more than 2.2Gb of RAM without valgrind.

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--- Comment #7 from Walter Bright <bugzilla@digitalmars.com> 2012-11-12 12:51:20 PST ---
If you're running the 64 bit dmd, shouldn't it be able to use far more virtual
memory (very slowly)?

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Alex Rønne Petersen <alex@lycus.org> changed:

           What    |Removed                     |Added
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                 CC|                            |alex@lycus.org


--- Comment #8 from Alex Rønne Petersen <alex@lycus.org> 2012-11-12 21:54:31 CET ---
Well, only if paging is enabled (i.e. there is a swap partition in use). I know I set my systems up without paging because I practically never need it.

@deadalnix How much RAM does your system have?

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