[Concurrency] Fix availability problem with UnownedTaskExecutor.

al45tair · al45tair · commit 94058e5e68fd · 2025-08-04T14:30:20.000+01:00
a550080 added a call to the new initializer, but that call came from a function annotated with `StdlibDeploymentTarget 6.2`, rather than `SwiftStdlib 6.2`, while the initializer was set to `SwiftStdlib 6.2`. This will fail in some build configurations (specifically where the target being built for is older than that implied by `SwiftStdlib 6.2`). rdar://157217460
diff --git a/stdlib/public/Concurrency/Executor.swift b/stdlib/public/Concurrency/Executor.swift
@@ -820,7 +820,7 @@ public struct UnownedTaskExecutor: Sendable {
     unsafe self.executor = Builtin.buildOrdinaryTaskExecutorRef(executor)
   }
 
-  @available(SwiftStdlib 6.2, *)
+  @available(StdlibDeploymentTarget 6.2, *)
   @inlinable
   public init<E: TaskExecutor>(_ executor: __shared E) {
     unsafe self.executor = Builtin.buildOrdinaryTaskExecutorRef(executor)

Original file line number	Diff line number	Diff line change
`@@ -820,7 +820,7 @@ public struct UnownedTaskExecutor: Sendable {`
`820`	`820`	`unsafe self.executor = Builtin.buildOrdinaryTaskExecutorRef(executor)`
`821`	`821`	`}`
`822`	`822`
`823`		`- @available(SwiftStdlib 6.2, *)`
	`823`	`+ @available(StdlibDeploymentTarget 6.2, *)`
`824`	`824`	`@inlinable`
`825`	`825`	`public init<E: TaskExecutor>(_ executor: __shared E) {`
`826`	`826`	`unsafe self.executor = Builtin.buildOrdinaryTaskExecutorRef(executor)`