Thread Without Join (ARCH9041)

Key swift.async.thread-without-join · Severity warning · Category async

Flags Thread { } / Thread(block:) started and never joined or stored - its failures are invisible.

Incorrect

Thread { export() }.start()

Correct

Task.detached { export() }  // or an OperationQueue you can wait on

Fix

Use Task / OperationQueue with a handle you can await or cancel.