• via Digitalmars-d-bugs (34/34) Jul 10 2016 https://issues.dlang.org/show_bug.cgi?id=16261

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=16261

          Issue ID: 16261
           Summary: dmd -profile & nativeToLittleEndian() --> wrong result
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Mac OS X
            Status: NEW
          Severity: major
          Priority: P1
         Component: phobos
          Assignee: nobody puremagic.com
          Reporter: johan556 gmail.com

When the -profile flag is given to dmd, a call to nativeToLittleEndian() gives
wrong result. The following code works without -profile:

  import std.stdio;
  import std.bitmanip;
  int
  main(string[] argv)
  {
      int value = 42;
      auto res = nativeToLittleEndian(value);
      writeln("nativeToLittleEndian(", value, ") = ", res);
      // expected output: nativeToLittleEndian(42) = [42, 0, 0, 0]
      return 0;
  }

but with -profile it prints what seems to be garbage bytes, even different
values each time the program is  executed.

The version of the compiler was "DMD64 D Compiler v2.071.1", and I have also
built DMD from source today getting the same problem.

I also tried the example code in the documentation of nativeToLittleEndian() at
dlang.org. There too, when I build with -profile, the code does not work (gives
an assert).

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