https://issues.dlang.org/show_bug.cgi?id=15047
Issue ID: 15047 Summary: "used before set" error with void initialization (only with -O) Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: schue...@gmx.net // xx.d int testCopy() { int a = void; int b = void; int fun(int x) { int y = x; return y; } b = fun(a); return b; } # dmd -c -O xx.d xx.d(7): Error: variable a used before set # dmd -c xx.d (no error) This currently breaks compiling vibe.d with optimization for me: vibe/core/core.d(1693,11): Error: variable a used before set I'm going to try and see if I can get digger to work again... --