https://issues.dlang.org/show_bug.cgi?id=17215
--- Comment #3 from Martin Nowak <c...@dawg.eu> --- cat > bug.d << CODE alias vec = __vector(int[4]); vec binop(vec a) { vec b = a; return b; } CODE dmd -c -O bug ---- Internal error: backend/cgcod.c 1659 ---- Further reduced, no longer requires -inline. --