Fix thread unsafety in GFileMonitorSource and mimeapps test
See the commit messages. Based on my approach in #1903 (comment 617125), and @smcv’s analysis from the comments below it.
Closes #1903 (closed)
See the commit messages. Based on my approach in #1903 (comment 617125), and @smcv’s analysis from the comments below it.
Closes #1903 (closed)