Hello list. The following script can be used to reproduce the problem. It seems to be related to sub-processes terminating at the "wrong" moment. The symptom: The script runs for some time counting up until at some moment the script hangs in the read function. Once this happens, the timeout is no longer respected at all. Only a keypress frees the script again.
Tested versions: bash-5.1.16 with readline 8.1.2 bash-5.2.15 with readline 8.2.1 Regards, Bodo #! /bin/bash i=0 bug=true # With bug=false the bug disappears while true do let i=i+1 if $bug then sleep 1 & fi echo -en "\r>>> $i" read -s -n999 -t0.01 key echo -en "\r<<< $i" done