[6.3][Concurrency] Allow transferring nonisolated(nonsending) to isolati…
#85617
+40
−11
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…on boundary closures
Explanation:
Isolation boundary closures don't assume parent isolation and should be able to get
nonisolated(nonsending)transferred to them jus like regular nonisolated closures do.Resolves: rdar://163792371
Main Branch PR: [Concurrency] Allow transferring
nonisolated(nonsending)to isolati… #85603Risk: Low. Affects only isolation boundary closures (i.e. passed to a
@Sendableparameter) when the parameter is alsononisolated(nonsending).Reviewed By: @hborla
Testing: Added new test-cases to the suite.
(cherry picked from commit 2335293)