Re: Prompt overwrites command output if prompt contains unicode character and non-printing escape sequence

Grisha Levit <[email protected]> Mon, 18 May 2026 14:53:07 -0400

Newsgroups	gmane.comp.shells.bash.bugs
Message-ID	<CAMu=Brp-XeST6Hi2-PV3EbReRM8CyHhiTHz0pMcCmvC+tX5kFQ@mail.gmail.com>

On Mon, May 18, 2026 at 12:24 PM Lennart Ackermans via Bug reports for
the GNU Bourne Again SHell <[email protected]> wrote:
>
> Dear Chet,
>
> Do you mean that commands should output a newline at the end? I don't
> have control over what all commands do that I run, and sometimes they
> don't end with a newline. It would be nice if I could still read their
> last lines, like in bash 5.2.
>

Specifically, this looks to have been introduced as part of [1], after
which a \r is output while printing the prompt:

    $ PS1='€ \[\e[0m\]' bash --norc -i <<< 'echo -n X' |& bat -A
    \u{20ac}·␛␍\u{20ac}·␛echo·-n·X␊
    X\u{20ac}·␛␍\u{20ac}·␛exit␊

[1] https://git.gnu.org/cgit/bash.git/diff/lib/readline/display.c?id=25e213a5