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digitalmars.D.bugs - [Issue 4682] New: Run-time Vs Compile-time of int.min % -1

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4682

           Summary: Run-time Vs Compile-time of int.min % -1
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc


--- Comment #0 from bearophile_hugs eml.cc 2010-08-19 14:34:54 PDT ---
With dmd 2.048 this program gives (on Windows) a runtime error:

int foo(int x, int y) {
    return x % y;
}
void main() {
    int r = foo(int.min, -1);
}



But the same operation done at compile time gives no errors, and foo returns 0:

int foo(int x, int y) {
    return x % y;
}
static assert(foo(int.min, -1) == 0);
void main() {}


So one of the two cases is wrong (or both).

While floating point operations done at compile-time may give slightly
different results, I'd like integral operations to give the same results at
compile-time and run-time.

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parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4682


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


--- Comment #1 from Walter Bright <bugzilla digitalmars.com> 2011-07-31
12:08:14 PDT ---
https://github.com/D-Programming-Language/dmd/commit/7ef3b2bb9e740df39108957ae5e3b2aa8253d351

https://github.com/D-Programming-Language/dmd/pull/284

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