Kavon Farvardin 814fb42554 fix nested suspension issue with objc async calls ...

when two objc async functions are composed with each other,
i.e., f(g()), then the clean-ups for g() would get emitted
at an unexpected time, namely, during the suspension for
the call to f(). This means that using a clean-up to emit
the executor-hop breadcrumb was incorrect. The hop could
appear between a get_async continuation and its matching
await_continuation, which is an unsupported nested suspension.

This commit fixes that by removing the use of the breadcrumb
clean-up in favor of providing that breadcrumb directly to
the result plan, so that it may be emitted later on when the
result plan sees fit.

Fixes rdar://91502776

2022-05-02 18:20:59 -07:00

1.6 KiB

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