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Regression: Can't switch between windows of same app after some time #16
Description
Eventually Alt-Tilde/Backquote seems to stop working. "Eventually" as in after cmdtab has run for some time. Probably something goes wrong after cmdtab has observed more than 128 window changes, which is max history entries. The code that handles the overflow is here. Admittedly I wrote this while rather exhausted, so I won't be surprised if it's wonky.
Activity
[-]Can't switch between windows of same app after some time[/-][+]Regression: Can't switch between windows of same app after some time[/+]german-one commentedon May 7, 2025
I can't repro. However, you generate an off-by-one in the linked code.
In the
ifbranch, postfix incrementation should be usedsizeof History[0] * HistoryCount++and in the
elsebranch take eithersizeof History[0] * (HistoryCount - 1)or, preferably something like
sizeof History[0] * (countof(History) - 1)orsizeof History - sizeof History[0]to tell the compiler it's a constant expression which doesn't need to be calculated at runtime.
I'll refrain from further PRs for now as it doesn't seem you have time to review them at the moment.
stianhoiland commentedon Aug 19, 2026
This issue might have been fixed by #33/#36. I haven't kept track, so it might have disappeared (or not!) from other changes. I'll close if I eventually feel confident that I'm not having this issue anymore.