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digitalmars.D.bugs - [Issue 3996] New: Algebraic with struct crashes compiler

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3996

           Summary: Algebraic with struct crashes compiler
           Product: D
           Version: 2.041
          Platform: x86_64
        OS/Version: Mac OS X
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: michel.fortin michelf.com


--- Comment #0 from Michel Fortin <michel.fortin michelf.com> 2010-03-21
09:51:37 EDT ---
DMD 2.041 and 2.042 on Mac OS X crash with this input. It was working a few
versions before, but I don't know exactly at which point it broke.

import std.variant;
struct A {}
alias Algebraic!(A) sts;

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Mar 21 2010
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3996


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
                 CC|                            |clugdbug yahoo.com.au
           Platform|x86_64                      |All
            Summary|Algebraic with struct       |ICE Regression(2.041):
                   |crashes compiler            |Passing struct as AA
                   |                            |template parameter
                   |                            |(Algebraic with struct)
         OS/Version|Mac OS X                    |All


--- Comment #1 from Don <clugdbug yahoo.com.au> 2010-06-09 11:57:21 PDT ---
Reduced test case shows it's a regression from AAs becoming a library type.

template ICE3996(T : V[K], K, V) {}

struct Bug3996 {}

static assert(!is( ICE3996!(Bug3996) ));

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Jun 09 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |regression


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--- Comment #2 from Don <clugdbug yahoo.com.au> 2010-06-15 07:21:22 PDT ---
I think the root cause of this is bug 4269.

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Jun 15 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rsinfu gmail.com


--- Comment #3 from Don <clugdbug yahoo.com.au> 2010-07-13 08:14:34 PDT ---
*** Issue 4449 has been marked as a duplicate of this issue. ***

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Jul 13 2010
prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


--- Comment #4 from Don <clugdbug yahoo.com.au> 2010-09-06 14:01:17 PDT ---
This turns out to be simple. When there's an error in the AA parameters, it
should not continue to instantiate the template.
There's no "error declaration", so return a struct of type TError. Not sure if
it's OK to give it no name.
(Would also be possible to return NULL in this case, but then everything that
calls it would need to be changed, to prevent segfaults).

PATCH(mtype.c): Line 3966

StructDeclaration *TypeAArray::getImpl()
{
    // Do it lazily
    if (!impl)
    {
        Type *index = this->index;
        Type *next = this->next;
        if (index->reliesOnTident() || next->reliesOnTident())
        {
            error(loc, "cannot create associative array %s", toChars());
            index = terror;
            next = terror;
+            StructDeclaration *s = new StructDeclaration(0, NULL);
+            s->type = terror;
+            return s;
        }

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Sep 06 2010
prev sibling parent d-bugmail puremagic.com writes:
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Walter Bright <bugzilla digitalmars.com> changed:

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


--- Comment #5 from Walter Bright <bugzilla digitalmars.com> 2010-09-11
14:17:47 PDT ---
http://www.dsource.org/projects/dmd/changeset/672

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Sep 11 2010