• d-bugmail puremagic.com (37/37) Sep 22 2011 http://d.puremagic.com/issues/show_bug.cgi?id=6713
• d-bugmail puremagic.com (15/15) Jan 28 2012 http://d.puremagic.com/issues/show_bug.cgi?id=6713

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6713

           Summary: Segfault with typeid of an alias
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: clugdbug yahoo.com.au



From the test suite, test1() in testtypeid.d, if 'typedef' is replaced by
'alias', a runtime segfault occurs. It works if typedef is used instead.

import std.stdio;

class ABC { }

alias ABC DEF; // typedef ABC DEF; is OK.

TypeInfo foo()
{
    ABC c;

    return typeid(DEF);
}

void main()
{
    TypeInfo ti = foo();
    TypeInfo_Typedef td = cast(TypeInfo_Typedef)ti;
    assert(td);

    ti = td.base;

    TypeInfo_Class tc = cast(TypeInfo_Class)ti;
    assert(tc);

    printf("%.*s\n", tc.info.name.length, tc.info.name.ptr);
    assert(tc.info.name == "testtypeid.ABC");

}

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6713


Walter Bright <bugzilla digitalmars.com> changed:

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



15:25:47 PST ---
The problem is this line:

    TypeInfo_Typedef td = cast(TypeInfo_Typedef)ti;

ti is a TypeInfo_Class. There is no TypeInfo_Alias, and an alias isn't a
TypeInfo_Typedef.

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