https://issues.dlang.org/show_bug.cgi?id=17523 --- Comment #9 from Walter Bright <bugzilla at digitalmars.com> --- Also tried memset'ing the stack variables opnd1 .. opnd4 to 0xFF at the close of asmSemantic(). No errors. There is no host dependent code in iasm.d. So this is a bit mystifying. --