[Issue 18928] extern(C++) bad codegen, wrong calling convention

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18928

--- Comment #1 from Manu <turkeyman at gmail.com> ---
I'm suspecting an issue with RVO.
I think the MSC ABI has changed to guarantee RVO at some point in the last few
years... but I'm not sure why the static call and virtual call appear to be
called using different calling convention.

--