process stop after any exception with developing with reload feature

Checklist

• The bug is reproducible against the latest release or master.
• There are no similar issues or pull requests to fix it yet.

Describe the bug

In 0.15, with --reload, If I edit my source file with any exception on startup (most commnly a SynataxError triggered by auto save function or some typo), the uvicorn process will wait for next file change and then try to reload it again.

But after I upgrade it to 0.16, the process will exit. Then I’ll have to start uvicorn again.

Steps to reproduce the bug

Install uvicorn==0.16.0

write any working asgi app

start it with reload flag uvicorn server:app --reload

edit your server.py with any change with it raise a error when startup

then the uvicorn process exited

Expected behavior

uvicorn process wait for reload like old behavior

Actual behavior

uvicorn process exited

Debugging material

No response

Environment

python3.8 windows

uvicorn.exe pol.server:app --reload --port 3000

Additional context

No response

[trim21]

watchgod support executing a function after any fs event.

Add a new flag like --dev and add a thin wrapper to dispatch other flag like uvloop and port to uvicorn.run

[Kludex]

Yes. Thank you!