Bug 6015 – [CTFE] Strange behavior of assignment appears in a situation

struct Foo{ string field; } bool func(string input){ Foo foo; foo.field = input[0..$]; assert(foo.field == "test"); foo.field = "test2";//assignment1 assert(foo.field == "test");//assertion1 assert(foo.field == "test2");//assertion2 return true; } static assert(func("test")); This code doesn't work on dmd v2.053. Somehow assertion1 succeeds and somehow assertion2 fails in CTFE. This shows that assignment1 has wrong behavior.