** Changed in: tmux (Ubuntu Bionic)
Status: Confirmed => In Progress
** Description changed:
+ [Impact]
+
+ A memory leak in tmux causes it to eventually fail when run for long
+ periods of time. Since long term tmux sessions are common, this becomes
+ a real problem for sysadmins, etc.
+
+ [Test Case]
+
+ # apt update
+ # apt dist-upgrade -y
+ # apt install -y tmux
+ # tmux -L none -f /dev/null new-session -s leaky-tmux-test 'tmux set-option
-w -g pane-border-status top; tmux pipe-pane "cat>/tmp/leaky-tmux-test.log";
p=${TMUX#*,}; p=${p%,*}; s=0; j=0; echo "ITER: RSZ"; while [ $j -lt 6000 ] ; do
j=$((j+1)); n=$(ps hwo rsz $p); printf "\e]2;%d: %d\e\\\\\r%4d: %d" $j $n $j
$n; [ $s -ne $n ] && { echo; s=$n; }; done'
+ [exited]
+ # cat /tmp/leaky-tmux-test.log ; echo
+ ITER: RSZ
+ 1: 3712
+ 1360: 3776
+ 2725: 3904
+ 4215: 4032
+ 5743: 4160
+ 6000: 4160 (example output)
+
+ RSZ will only change during the test if there's a memory leak. By
+ comparison, we get correct behavior running without pane-border-status
+ top:
+
+ $ tmux -L none -f /dev/null new-session -s leaky-tmux-test 'tmux pipe-pane
"cat>/tmp/leaky-tmux-test.log"; p=${TMUX#*,}; p=${p%,*}; s=0; j=0; echo "ITER:
RSZ"; while [ $j -lt 6000 ] ; do j=$((j+1)); n=$(ps hwo rsz $p); printf
"\e]2;%d: %d\e\\\\\r%4d: %d" $j $n $j $n; [ $s -ne $n ] && { echo; s=$n; };
done'
+ [exited]
+ $ cat /tmp/leaky-tmux-test.log ; echo
+ ITER: RSZ
+ 1: 3492
+ 6000: 3492
+
+ [Regression Potential]
+
+ Since this is only plugging a memory leak, no other behavior should be
+ affected.
+
+ [Original Description]
+
The upstream bug is reported and fixed at
https://github.com/tmux/tmux/issues/1167.
Can we either patch the package (patch at
https://github.com/tmux/tmux/commit/c363c236aaea5b7a879493d8f3c85bead546f063)
or upgrade to 2.7 (I guess this is less likely to happen given the
imminent release).
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https://bugs.launchpad.net/bugs/1766942
Title:
tmux leaks memory in pane-border-status
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