Infinite reload loop after the first file change

[savchenko]

First launch with sphinx-autobuild . _build/html --port 8001 --open-browser --watch "$APP" works fine, however after a single .rst modification it goes into the infinite "change detected" rebuild loop.

Can be reproduced using Python v3.11 and v3.12, Sphinx v8.1.3, sphinx-autobuild v2024.10.3.

[vict0rsch]

Same when watching the source code directory:

1. sphinx-autobuild -a docs/source/ docs/build/html --watch src
2. Builds fine, starts local server and waits
3. Change Python file in src/
4. infinite loop