[Issue 15610] extern(C++) multiple inheritance - calling with wrong 'this' ptr

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15610

--- Comment #7 from Manu <turkeyman at gmail.com> ---
Also, I don't think this particular crash looks the same as the situation of my
other crash; neither rax or rcx are messed up in quite the same way, but they
are both messed up, so it might be related.
The other case is that the pointers are dereferenced one level too deep before
the call. This case appears that that the wrong offset is used as the vtable
pointer.

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