[llvm-bugs] [Bug 50499] New: Coroutine use after free on Clang 12.

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https://bugs.llvm.org/show_bug.cgi?id=50499

            Bug ID: 50499
           Summary: Coroutine use after free on Clang 12.
           Product: clang
           Version: 12.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++2a
          Assignee: unassignedclangbugs at nondot.org
          Reporter: z.zoelec2 at gmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Starting with Clang 12, the address sanitizers fail because of a use-after-free
any time `get_return_object` returns something that is not the parent object
and the parent object is not empty. Here's a reproducer:
https://godbolt.org/z/6Gfv3xG9o

Refs https://reviews.llvm.org/D103196 where this came up.

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