Pavel Yaskevich c04eb7c482 [Concurrency] Downgrade errors when isolated member is referenced from a preconcurrency context ...

Such references used to be downgraded until Swift 6 but since the
context is `@preconcurrency` it should be possible for API authors
to introduce concurrency annotations such as `@Sendable` without
breaking clients even when they are compiled in Swift 6 mode.

Resolves: rdar://157061896
(cherry picked from commit 5ee673f358c9dd7dbbfe58f02bc78af60e0377b8)

2025-07-30 11:03:30 -07:00

13 KiB

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