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digitalmars.D.bugs - [Issue 21698] New: Windows VisualD x86-mscoff fails to compare


          Issue ID: 21698
           Summary: Windows VisualD x86-mscoff fails to compare
           Product: D
           Version: D2
          Hardware: Other
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: bugzilla bernis-buecher.de

The following unittest fails on dlang.phobos (Windows_VisualD x86-mscoff) from
the Phobos testsuite:

    import std.math : pow;

    double d1 = 21800.0;
    assert(pow(d1,72) == double.infinity); // fails

    // additional infos:

    import std.stdio;
    writeln(pow(d1,72)); // inf
    writeln(typeof(pow(d1,72)).stringof); // double

    union A
        double a;
        ulong b;

    A a;
    a.a = pow(d1,72);
    writefln!"%.064b"(a.b); //

The output at the bottom shows, that value, type and even bitpattern are
correct. Anyway, the comparison fails. (It works on all other computers from
the test suite.)

Mar 10 2021