[6.2][Concurrency] Account for explicit @concurrent
on closures
#81237
+16
−0
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Cherry-pick of #81231
Explanation:
If closure is stated as
@concurrent
is has to be treated as nonisolated otherwise it could be possible to infer wrong isolation which results in data races.Main Branch PR: [Concurrency] Account for explicit
@concurrent
on closures #81231Risk: Low (This is specific to the new
@concurrent
which nobody should be using yet).Reviewed By: @ktoso @hborla
Resolves: rdar://150397825
Testing: Added new tests to the test suite.
(cherry picked from commit ef65f26)