[Issue 5942] New: Bitfields are overwritten erroneously

[d-bugmail]

http://d.puremagic.com/issues/show_bug.cgi?id=5942

           Summary: Bitfields are overwritten erroneously
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nob...@puremagic.com
        ReportedBy: samu...@voliacable.com


--- Comment #0 from Max Samukha <samu...@voliacable.com> 2011-05-07 04:03:20 
PDT ---
struct S
{
    mixin(bitfields!(
        int, "a" , 32,
        int, "b" , 32
    ));
}

void main()
{
    S data;
    data.b = 42;
    data.a = 1;
    assert(data.b == 42); // fail
}

Looks like assigning fields at offsets < 32 bit clears fields at offsets >= 32
bit.

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