[Issue 6812] New: Failed equality of structs with string field

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6812

           Summary: Failed equality of structs with string field
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2011-10-13 11:55:44 PDT ---
This program produces a runtime assert error, it's a bug:


struct Foo {
    string s;
}
void main() {
    Foo b1 = Foo("hello".idup);
    Foo b2 = Foo("hello".idup);
    assert(b1 !is b2); // OK
    assert(b1 == b2);  // line 8, error
}


With DMD 2.056head it gives:

core.exception.AssertError at test(8): Assertion failure


The equality among structs has to call the string equality of their fields. The
"is" operator has to compare the structs bitwise.

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