Bad pointer dereference in stateless task

Here's my entire code:

Task {
  try! await Task.sleep(nanoseconds: 1_000_000)

Guess what it outputs? (Hint: it's not "Hello")

That's right, it segfaults!

Segmentation fault (core dumped)

💣 Program crashed: Bad pointer dereference at 0x00007f931bfd0220

Thread 1 crashed:

0 0x00007f931bc5783e <unknown> in
1 0x00007f931a2c6f48

On further testing this seems to be sporadic -- usually it does print "Hello" -- but why can this even happen?

For environment info: this happened on SwiftFiddle with Swift 5.9.

Even I'm unable to reproduce this. I am baffled