[Issue 20082] Struct with extern destructor that's never called causes link error

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20082

--- Comment #2 from Manu <turkeyman at gmail.com> ---
I suspected the TypeInfo, but shouldn't that only contain destructor for
classes?
In my case, the struct is extern(C++) too, which means the D TypeInfo shouldn't
even exist?

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