Version 4.9.2 of mod_wsgi can be obtained from:
https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.9.2
When using mod_wsgi-express in daemon mode, and source code reloading was enabled, an invalid URL path which contained a byte sequence which could not be decoded as UTF-8 was causing a process crash.
mod_wsgi-express