Actor boundary warning for @TaskLocal values

[mroi]

Description
I am getting this warning with Version 14.1 (14B47b):

actor Test {

	@TaskLocal static var local: Int?

	func run() async {
		await Self.$local.withValue(42) {  // ⚠️
			await work()
		}
	}

	func work() async {
		print("Hello \(Self.local ?? 0)")
	}
}

await Test().run()

warning: non-sendable type '() async throws -> ()' exiting actor-isolated context in call to non-isolated instance method 'withValue(_:operation:file:line:)' cannot cross actor boundary

Steps to reproduce

1. copy the above code into a file test.swift
2. run swift -warn-concurrency test.swift

Expected behavior
The code should not produce a warning if it is legal code.

Environment

• swift-driver version: 1.62.15 Apple Swift version 5.7.1 (swiftlang-5.7.1.135.3 clang-1400.0.29.51)
• Target: x86_64-apple-macosx13.0
• Xcode 14.1, Build version 14B47b

Additional context
Mentioned on Swift forum.

[ktoso]

Thanks for reporting, this is an unfortunate missing @Sendableon the closure of withValue.

Fix here: #62239