# Pastebin btk14aPk
1. new Promise is created, read, and disposed (https://github.com/nim-lang/Nim/blob/devel/tests/async/tnewasyncudp.nim#L57)
2. next iteration of loop starts (https://github.com/nim-lang/Nim/blob/devel/tests/async/tnewasyncudp.nim#L51)
3. new promise is created (https://github.com/nim-lang/Nim/blob/devel/tests/async/tnewasyncudp.nim#L55)
4. the new Call invokes a GC mark pass
5. Closure from step 1 is followed.
6. Pointer to Promise that was disposed in step 1 is found
7. Error! the promise is already destroyed.