My favorite tool for finding the source of regression bug is git bisect. Here’s what I knew to start with: A bug report was filed on October 21 (almost a month ago) on our main branch. This bug doesn’t exist in the previous version of our software, which was branched from main as the branch release-5.7.0. The branch release-5.7.0 was created about two months ago, and a lot has changed in main since then. This is the process I went through to find the change that caused this bug. Find a commit wh...