[Concurrency] Infer @preconcurrency @MainActor in default main acto…
#81627
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…r mode for language modes < 6 `@MainActor` errors are hard errors, even in minimal concurrency checking in Swift 5 mode. When users set the default isolation to main actor, we should infer `@preconcurrency @MainActor` in language modes < 6 to get the right diagnostic staging behavior. Resolves: rdar://151029517
hborla
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May 19, 2025
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@swift-ci please test |
hamishknight
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May 22, 2025
This reverts commit 37e1fc8.
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…r mode for language modes < 6
@MainActorerrors are hard errors, even in minimal concurrency checking in Swift 5 mode. When users set the default isolation to main actor, we should infer@preconcurrency @MainActorin language modes < 6 to get the right diagnostic staging behavior.Resolves: rdar://151029517