[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 #8 from Marco Leise <Marco.Leise at gmx.de> ---
The implication is that when a thread destroys an object it already uniquely
owns it.

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