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

[d-bugmail at puremagic.com]

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 at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at 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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