[Issue 8295] Struct member destructor can not be called from shared struct instance

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=8295

--- Comment #9 from anonymous4 <dfj1esp02 at sneakemail.com> ---
It might own the struct, but not the referenced data. Again example is
reference counter: destruction can depend on sharing. Another example is that
shared data can't be (de)allocated with thread local allocator.

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