https://issues.dlang.org/show_bug.cgi?id=16243
Issue ID: 16243 Summary: wrong argument passed with empty struct and 6 integers Product: D Version: D2 Hardware: x86 OS: Mac OS X Status: NEW Keywords: wrong-code Severity: normal Priority: P3 Component: dmd Assignee: nob...@puremagic.com Reporter: c...@dawg.eu The bug is OSX-32 only, so not that important (P3), but looks easy to fix. cat > bug.d << CODE struct S13956 { } extern(C++) void func13956(S13956 arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6); extern(C++) void check13956(S13956 arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6) { assert(arg0 == S13956()); assert(arg1 == 1); assert(arg2 == 2); assert(arg3 == 3); assert(arg4 == 4); assert(arg5 == 5); assert(arg6 == 6); // fails on OSX 32-bit } void main() { func13956(S13956(), 1, 2, 3, 4, 5, 6); } CODE dmd -m32 -run bug ---- The arg6 parameter is uninitialized (or maybe a pointer). See disabled test case here https://github.com/dlang/dmd/pull/5915/commits/6e6c6ed9db5935fb36e9b06e309cea6be7afa9b1. --