Don't implement swift_task_deinitOnExecutorMainActorBackDeploy in the task-to-thread model

DougGregor · DougGregor · commit bfb62e126204 · 2025-07-01T16:06:05.000-07:00
diff --git a/stdlib/public/Concurrency/MainActor.swift b/stdlib/public/Concurrency/MainActor.swift
@@ -162,8 +162,6 @@ extension MainActor {
     try assumeIsolated(operation, file: file, line: line)
   }
 }
-#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
-
 
 #if os(macOS) || os(iOS) || os(watchOS) || os(tvOS) || os(visionOS)
 @_extern(c, "pthread_main_np")
@@ -197,4 +195,6 @@ public func _deinitOnExecutorMainActorBackDeploy(
 }
 #endif
 
+#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
+
 #endif // !$Embedded

Original file line number	Diff line number	Diff line change
`@@ -162,8 +162,6 @@ extension MainActor {`
`162`	`162`	`try assumeIsolated(operation, file: file, line: line)`
`163`	`163`	`}`
`164`	`164`	`}`
`165`		`-#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY`
`166`		`-`
`167`	`165`
`168`	`166`	`#if os(macOS) \|\| os(iOS) \|\| os(watchOS) \|\| os(tvOS) \|\| os(visionOS)`
`169`	`167`	`@_extern(c, "pthread_main_np")`
`@@ -197,4 +195,6 @@ public func _deinitOnExecutorMainActorBackDeploy(`
`197`	`195`	`}`
`198`	`196`	`#endif`
`199`	`197`
	`198`	`+#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY`
	`199`	`+`
`200`	`200`	`#endif // !$Embedded`