[Issue 2990] New: TypeInfo.init() returns invalid array

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2990

           Summary: TypeInfo.init() returns invalid array
           Product: D
           Version: 1.044
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: nfxjfg at gmail.com


Sometimes, the array TypeInfo.init() returns has a length, but ptr is null.
Accessing an element of such an array causes segfaults. This can't be right.
TypeInfo.init() should just return an empty array.

Example follows. This outputs "ptr=0000 length=4".

import std.stdio;

struct X {
   int y;
}

void main() {
   TypeInfo ti = typeid(X);
   writefln("ptr=%s length=%s", ti.init.ptr, ti.init.length);
}

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