Today I got an email from the GNU Emacs bug tracking system notifying me that a bug I filed in 2008, which involves _random, complete unrecoverable loss of all undo history_, had been addressed. 13 years later, they've resolved it as "won't fix": https://debbugs.gnu.org/cgi/bugreport.cgi?bug=530 …
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(You can understand, perhaps, why I don't use GNU Emacs as an editor anymore :)
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Replying to @cmuratori
Seems like it was actually merged with another bug, which suggests that this was caused by hitting the undo-limit. won't-fix appears to be misleading, as you can customize the size of the undo-limit.
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Replying to @MartinClausen8
The other bug was also marked won't-fix, so there's no difference. Either way, it's a bug. Hitting the "undo limit" should not cause you to be unable to undo _anything_. It's a bug in the implementation of how undos are discarded at the very least.
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Replying to @cmuratori
I agree, not ideal, but at least they explain how to work around it in the other bug.
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Replying to @MartinClausen8
They did not. They believe they know what the bug is, but they didn't. I'm a professional programmer, I know when the "undo limit" would be hit. These were small changes being undone, much smaller than equivalent cases you would do all the time.
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They basically just marked it "won't fix" because they didn't want to follow up with me or add tracing or look for the bug. Period.
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