[Concurrency] Work around issue with old compilers and newer _Concurrency lib

DougGregor · DougGregor · commit 46c9de8ba8f4 · 2021-03-30T16:27:08.000-07:00
Fixes rdar://75996690.
diff --git a/stdlib/public/Concurrency/Task.swift b/stdlib/public/Concurrency/Task.swift
@@ -667,7 +667,9 @@ internal func _runTaskForBridgedAsyncMethod(_ body: @escaping () async -> Void)
   // if we're already running on behalf of a task,
   // if the receiver of the method invocation is itself an Actor, or in other
   // situations.
+#if compiler(>=5.5) && $Sendable
   Task.runDetached { await body() }
+#endif
 }
 
 #endif

Original file line number	Diff line number	Diff line change
`@@ -667,7 +667,9 @@ internal func _runTaskForBridgedAsyncMethod(_ body: @escaping () async -> Void)`
`667`	`667`	`// if we're already running on behalf of a task,`
`668`	`668`	`// if the receiver of the method invocation is itself an Actor, or in other`
`669`	`669`	`// situations.`
	`670`	`+#if compiler(>=5.5) && $Sendable`
`670`	`671`	`Task.runDetached { await body() }`
	`672`	`+#endif`
`671`	`673`	`}`
`672`	`674`
`673`	`675`	`#endif`