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digitalmars.D.bugs - [Issue 4093] New: Segfault(interpret.c): with recursive struct templates

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4093

           Summary: Segfault(interpret.c): with recursive struct templates
           Product: D
           Version: 2.040
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: clugdbug yahoo.com.au



struct Zug(int Z){
    const void * bahn = Bug4093!(0).hof.bahn;
}

struct Bug4093(int Q){
    Zug!(0) hof;
}

const a = Zug!(0).bahn;
====
crash.d(220): Error: 'this' is only defined in non-static member functions, not
crash
crash.d(220): Error: this for hof needs to be type Bug4093 not type int

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Apr 15 2010
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4093




This bug is completely fixed by the patch to 4094. However, I think this bug
does reveal another problem which is also worth fixing.

The segfault itself can also be fixed with this patch to expression.c line 280.
The error message it gives is nonsense (so the patch to bug 4094 fixes that),
but I think adding more ErrorExps is no bad thing, and may prevent another
future crash.


            e1->error("this for %s needs to be type %s not type %s",
                var->toChars(), ad->toChars(), t->toChars());
+            e1 = new ErrorExp();
        }

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Apr 20 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4093


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED



Fixed DMD2.044

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May 05 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
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siegelords_abode yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |siegelords_abode yahoo.com



The test code in the original comment does not compile on DMD2.048 (Error:
variable hof cannot be read at compile time) and causes a segfault in DMD1.063.
Is this bug really fixed?

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Sep 05 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |



Although this bug is fixed in D2, it is NOT fixed for D1 (where it generates a
stack overflow).

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Apr 28 2011
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4093


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED





 Although this bug is fixed in D2, it is NOT fixed for D1 (where it generates a
 stack overflow).


Don't know why I thought that. This bug never existed on D1. The stack overflow
only occurs on a debug version of DMD; on a release DMD, it generates a
"recursive template expansion" error. There's no difference between D1 and D2;
change the 'const void *' to 'enum void *' to see the D1 behaviour in D2.

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Dec 23 2011