5a570e1fd1b2a27d2ff6fa1ad41d316d2167dfe2 breaks non-local returns from Mutex.withLock

[chaoren]

Describe the bug

What happened? What should have happened instead?

Prior to 5a570e1, you can return from a Mutex.withLock block and the mutex will unlock as expected.

After 5a570e1, the mutex will remain locked after the return.

Provide a Reproducer

• If possible, please provide a small self-contained project (or even just a single file) where the issue reproduces.

  val mutex = Mutex()
  
  suspend fun nonLocalReturn() { mutex.withLock { return } }
  
  fun main() {
    runBlocking {
      nonLocalReturn()
      println(mutex.isLocked) // should be false
    }
  }

[chaoren]

Oh, sorry. Dupe of #3985.