[DDMD] Issue 13161 - Wrong offset of extern(C++) class member

https://issues.dlang.org/show_bug.cgi?id=13161
> We've done this many times in the past. It saves time.

I guess my usual problem isn't actually abi compatibility, but the fact that older dmds can't handle newer druntime di files, usually because of added attributes.  This has always gotten in the way of trying to bisect dmd.

I had a script at some point that found a matching druntime/phobos commit for the current dmd commit by searching for the one that was in master when the dmd commit was merged.  Sure, you still have to rebuild druntime but that's lightning quick on win32.  This works much better than putting hacks into dmd/druntime.

If you do put workarounds into dmd/druntime, please at least file a bug report to remember to remove the dead code.

> That indeed is a good reason. You should have mentioned that first :-)

It's rather minor, and I was trying to make a point.