Caught centos8 tmux (2.7-1.el8.x86_64) a couple times dropping out of
copy mode apparently in response to window size changes while showing a
different tmux window, tho now when i repeat what i thought was the
trigger sequence i can't repeat it again. Of course i was hoping to
catch focal tmux in the act of dropping out of copy mode, but not yet
today.
Meanwhile i do observe focal tmux (3.0a-2ubuntu0.1) oddly changing the
window size by one line and changing it right back again in response to
window size changes while showing a different tmux window. to wit:
$ alias ws='c=;while ((c==COLUMNS&&l==LINES))||{ c=$COLUMNS l=$LINES;echo
$(date +%F%a%T) ${l}x$c;};do sleep .05;done' #track window size changes
$ ws
2020-11-04Wed15:43:52 57x226
2020-11-04Wed15:44:00 24x80
2020-11-04Wed15:44:01 57x226
2020-11-04Wed15:44:15 56x226
2020-11-04Wed15:44:15 57x226
'24x80' was when i unmaximized the xterm, and '57x226' when i
remaximized it a second later, without changing the tmux window
meanwhile. However then i switched to show a different tmux window,
unmaximized, remaximized, and then when i switched the tmux window back,
you see the odd little dance where tmux changes by one line to '56x226'
and immediately back to '57x226'.
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https://bugs.launchpad.net/bugs/1902643
Title:
tmux drops out of copy mode (regression)
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