• d-bugmail puremagic.com (50/50) Dec 14 2011 http://d.puremagic.com/issues/show_bug.cgi?id=7108
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• d-bugmail puremagic.com (13/13) Dec 15 2011 http://d.puremagic.com/issues/show_bug.cgi?id=7108

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=7108

           Summary: ICE: TraitsExp::semantic(Scope*)  2.056 -> 2.057
                    regression - segfault
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: dlang chilon.net



Most of my d code now causes the compiler to core dump.  All 3 of 3 projects no
longer work and only two of them share code.

Here's the backtrace I got:

Program terminated with signal 11, Segmentation fault.




ScopeDsymbol*) ()




ArrayBase<Expression>*)
    ()

Type**, Dsymbol**) ()




ArrayBase<Expression>*)
    ()




ArrayBase<Expression>*)
    ()

Type**, Ds
ymbol**) ()

I'll try to narrow down the (multiple) constructs that cause this.

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d-bugmail puremagic.com writes:

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I found a null dereference bug in TraitsExp::semantic().
Following code kills dmd.

static assert(!__traits(hasMember, int, "x"));

In your environment, can you get similar backtrace?

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d-bugmail puremagic.com writes:

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 I found a null dereference bug in TraitsExp::semantic().
 Following code kills dmd.
 
 static assert(!__traits(hasMember, int, "x"));
 
 In your environment, can you get similar backtrace?

Yes!  Here is my code:

int main(string argv[]) {
    static assert(! __traits(hasMember, int, "x"));
    return 0;
}

I try to compile:

% dmd yo.d
zsh: segmentation fault (core dumped)  dmd yo.d

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d-bugmail puremagic.com writes:

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Back trace to your simplified case above:


(gdb) bt









Could be the same issue.

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Thanks. I'll post a patch to fix it.

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 Thanks. I'll post a patch to fix it.

Thanks.  I'll test your patch against my code when it's available.

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d-bugmail puremagic.com writes:

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Kenji Hara <k.hara.pg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code, patch
           Platform|x86_64                      |All
         OS/Version|Linux                       |All



https://github.com/D-Programming-Language/dmd/pull/560

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Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED



00:06:22 PST ---
https://github.com/D-Programming-Language/dmd/commit/653ada953f8f0f918706d4ce6ded828ca878f39f

https://github.com/D-Programming-Language/dmd/commit/0743d8f5dabc31b11f1622d98cba2d80d316b876

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