Hot Reloading running coroutine can sometimes cause issues

`this is what happens to me. First time I deleted for loop it works, because FSR reloaded scripts when coroutine entered the first loop. Second time I delete the same for loop, FSR reloads scripts while coroutine is inside the deleted loop and it freezes`

https://user-images.githubusercontent.com/6343986/231097378-5286c659-63c0-4863-adc9-d81d4b440e31.mp4

Start by reproducing the reported Unity scenario: delete the same for loop while a coroutine is inside it, including a second reload, and compare the behavior with the attached video. Trace the hot-reload handling for running coroutines; done means repeated loop deletion no longer freezes the play session.

索引モデルが issue の本文から書いたものです。