https://issues.dlang.org/show_bug.cgi?id=15793
Issue ID: 15793 Summary: Change !is error to warning Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: major Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: dfj1es...@sneakemail.com interface A { void f(); } void f(A a) { if(a!=null)a=null; } Error: use '!is' instead of '!=' when comparing with null Mother of god. --