[Issue 2167] New: is exp doesn't return correct result

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2167

           Summary: is exp doesn't return correct result
           Product: D
           Version: 1.030
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: davidl at 126.com


in bug:
http://d.puremagic.com/issues/show_bug.cgi?id=826
a slightly modified version as following passes the test
class Foo(T)
{ this() { unknown_identifier; } }

void bar()
{ 
    bool foobar = is( Foo!(int) ); 
    assert(foobar == false);
}
void main()
{
    bar();
}

but the comment from Thomas Kühne not:
http://dstress.kuehne.cn/compile/b/bug_e2ir_520_B.d 
this bug fails


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