https://issues.dlang.org/show_bug.cgi?id=13985
--- Comment #3 from Kenji Hara <k.hara...@gmail.com> --- (In reply to Vladimir Panteleev from comment #2) > The test is no longer reproducible after > https://github.com/D-Programming-Language/dmd/pull/4427 > > But I don't know if this fixed the underlying problem. It fixes this issue. The original problem was: a final function call super.mf(); wrongly looked up instance vtbl, and it would accidentally hit to Object.opCmp (it's in the third entry of vtbl). In D, there are three cases on a member function call which don't need to look up vtbl. 1) this.BaseClassType.func(); // DotTypeExp 2) super.func(); 3) this.func(); // func is a final function Issue 14211 was an issue in the case 3, and this was an issue in the case 2. I've properly handled all cases in that pull request. --