https://issues.dlang.org/show_bug.cgi?id=14179
--- Comment #4 from github-bugzi...@puremagic.com --- Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/0687872a11386f5cb9da0d88af59cf460badf2d7 Fix Issue 14179 - Posix x86_64 varargs prolog clobbers RDX RDX is used in the prolog but may be used to pass named arguments. When used for a named argument, store in R11 during prolog. https://github.com/D-Programming-Language/dmd/commit/d08a9afeb7670aae4a6a7c74518b94a937bd96a6 Merge pull request #4413 from yebblies/issue14179 Issue 14179 - Posix x86_64 varargs prolog clobbers RDX --