Hi,
I’m noticing some strange behavior in the terminal when I cycle through the bash history if that contains a very large command that exceeds the terminal window size, then the terminal starts acting weird.
Steps to reproduce:
- Open the terminal
- Execute a very large dummy command:
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- Run another command:
echo test - Press the UP arrow twice
- You should now have the aaa command visible. Notice that the cursor is located at the end of the command. So the PS1 string shouldn’t be in the visible area right now. (so far so good)
- Press the DOWN arrow once
- Notice that the cursor is located at the end of where it would be if PS1 + ‘echo test’ would be rendered. But instead there’s only whitespace before the cursor.
- Scroll up slightly and notice that ‘echo test’ has been appended to the aaa characters.
- Press ENTER and notice that the echo command is correctly executed.
Since the correct command is executed at #9, this seems to be purely a display/rendering error.
Expected behavior:
7. I’d expect the terminal to display me@suse:~# echo help with the cursor located at the end.
8. Even if you do a few more echos echo test1, then echo test2, then UP twice and DOWN once, then scroll, the large aaa command is suddenly visible directly above the current line. I expect this not to happen.
Additional info:
My PS1 line \[$(ppwd)\]\[\]\u@\h\[\]:\[\]\w\[\]#
Screenshot to capture tput colors.
I’ve also tested export PS1=simpletest: && export TERM=xterm but this results in the same behavior.
Hoping anyone might have a clue why this could happen and how to solve it.