[Issue 15956] Incorrect value inside enum using simd vectors, weird tym errors, and weird if(true) {} partial solution.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15956

--- Comment #1 from joeks at mail.de ---
As far as I can tell this problem stems from the fact, that some of the types
in core.simd are not working AT ALL.
Consider this simple example:
    double4 f;
    f[0] = 1.0;
    f[1] = 2.0;
    f[2] = 3.0;
    f[3] = 4.0;
    writeln(f);
This outputs: [1, 2, 0, 6.95325e-310]

I wonder has noone ever tried to use this type in any program or did not notice
this obviously completely wrong result?

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