BASH PATCH REPORT
=================
Bash-Release: 5.3
Patch-ID: bash53-017
Bug-Reported-by: Lennart Ackermans <[email protected]>
Bug-Reference-ID: <[email protected]>
Bug-Reference-URL:
https://lists.gnu.org/archive/html/bug-bash/2026-05/msg00066.html
Bug-Description:
If readline is invoked with the cursor somewhere other than column 0, and
the prompt contains multibyte characters, the display algorithm needs to
use a buffer offset, instead of the physical prompt length, to determine
whether or not to reprint the prompt from column 0 because the cursor is
before the last invisible character in the prompt string.
Patch (apply with `patch -p0'):
*** ../bash-5.3-patched/lib/readline/display.c Thu Sep 4 11:55:37 2025
--- lib/readline/display.c Fri May 22 14:55:01 2026
***************
*** 1498,1502 ****
only need to reprint it if the cursor is before the last
invisible character in the prompt string. */
- /* XXX - why not use local_prompt_len? */
nleft = prompt_visible_length + wrap_offset;
if (cursor_linenum == prompt_last_screen_line)
--- 1498,1501 ----
***************
*** 1510,1518 ****
buffer position, an index into curline
(local_prompt + pmt_offset) */
! cursor_bufpos = pmt_offset;
! if (mb_cur_max == 1 || rl_byte_oriented)
! cursor_bufpos += _rl_last_c_pos;
! else
! cursor_bufpos += _rl_last_c_pos + curline_invchars;
if (local_prompt && local_prompt_invis_chars[cursor_linenum] &&
--- 1509,1513 ----
buffer position, an index into curline
(local_prompt + pmt_offset) */
! cursor_bufpos = pmt_offset + local_prompt_len;
if (local_prompt && local_prompt_invis_chars[cursor_linenum] &&
*** ../bash-5.3/patchlevel.h 2020-06-22 14:51:03.000000000 -0400
--- patchlevel.h 2020-10-01 11:01:28.000000000 -0400
***************
*** 26,30 ****
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 16
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 17
#endif /* _PATCHLEVEL_H_ */
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
