[Issue 20296] Segfault when using variadic D functions with extern(C++) linkage

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20296

--- Comment #1 from Andrej Mitrovic <andrej.mitrovich at gmail.com> ---
It segfaults in the mangler, it seems it has an issue with pointers of any
type.

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