Hello guys ! I'm found strange error when compiling following code: http://dpaste.1azy.net/b40ce9a4 The error is: src\phobos\std\stdio.d(1872): Error: variable _param_1 used before set Problem exists only when using following options: -inline -O I'm using DMD 2.063.2 on Windows. Can anybody help with it ? Also i can't minimize the test-case.