Package: bash Version: 5.2~rc2-2 Dear Maintainer,
I was seeing incorrect cursor behaviour when my PS1 prompt got long, and
was surprised to learn that merely moving a space character from after a
control sequence to before it fixed the problem. Based on the man page,
I think I've used the "non-printing" escapes correctly.
Try this in an 80-character-wide terminal:
x159=''
while [ "${#x159}" -lt 159 ]; do x159=x$x159; done
PS1=$'\\[\x1b[0;33;40m\\]'$x159$'$\\[\x1b[0m\\] '
Then enter an ordinary character such as 't'. I see my cursor move up a
line to the final 'x' before '$', instead of the expected position after
the 't' I just entered. But I see no problem with this prompt:
PS1=$'\\[\x1b[0;33;40m\\]'$x159$'$ \\[\x1b[0m\\]'
I only moved the trailing space. It's outside the non-printing sequence
delimited by \[ and \] in both cases, so I'd expect no difference except
the colour of that cell.
- Michael
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.18.0-4-amd64 (SMP w/32 CPU threads; PREEMPT)
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ii libc6 2.34-7
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pn bash-completion <none>
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