[Issue 21693] extern(C++) class instance dtors are never called, breaking RAII

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21693

--- Comment #9 from Dlang Bot <dlang-bot at dlang.rocks> ---
@MoonlightSentinel created dlang/dmd pull request #12408 "Merge stable into
master" mentioning this issue:

- Issue 21693 - Lower scoped destruction of extern(C++) class to destroy/dtor
call (#12265)

  * Issue 21693 - Lower scoped destruction of extern(C++) class to destroy

  Ensures proper RAII behaviour for stack allocated instances but doesn't
  affect the behaviour for heap allocated instances.

  The previous rewrite used `delete` which relies on `TypeInfo` and
  crashed at runtime. Using `object.destroy` circumvents this issue (and
  is also beneficial due to the deprecation of `delete`).

  `destroy` can be used instead of `delete` because the instances live on
  the heap and hence don't need to be deallocated.

https://github.com/dlang/dmd/pull/12408

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