https://issues.dlang.org/show_bug.cgi?id=14958
Issue ID: 14958 Summary: Casting a double to ulong sometimes produces wrong results Product: D Version: D2 Hardware: All OS: Windows Status: NEW Severity: critical Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: marcio...@gmail.com import std.stdio; void main() { double x = 1.2; writeln(cast(ulong)(x * 10.0)); double y = 1.2 * 10.0; writeln(cast(ulong)y); } Output: 11 12 to!ulong instead of the cast does the right thing, and is a viable work-around. --