When a tool fails, you can lose an entire day debugging it. But the cause is often surprisingly simple. Can we save time with a little math? Use binary search. You can find the culprit in time.
Git Bisect
When working with git, atomic commits are helpful because you can use git bisect.
I once fixed a bug where the menu order got shuffled (PR). With binary search, I found the culprit in 30 minutes. Changing a vector to a set caused it. I wasted time asking GPT because there were too many commits. Smaller commits would have helped.
VSCode Extension Bisect
Since the previous day, the input box overlapped every time I typed Korean. I rebooted and tried different IMEs, but nothing worked. Then I remembered VSCode can bisect extensions.
The culprit was the last extension I installed, which conflicted with the IME. Removing it fixed the issue.