Bash-5.3 patch 17: Modify the readline redisplay code to use a buffer offset instead of the physical prompt length in a multibyte locale to determine whether to reprint the prompt from column 0 because the cursor is before the last invisible character in the prompt string.

lib/readline/display.c

@@ -1497,7 +1497,6 @@ rl_redisplay (void)
 	     the characters from the current cursor position.  But we
 	     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)
 	    {
@@ -1509,11 +1508,7 @@ rl_redisplay (void)
 	         on the current screen line begins in the buffer. It is a
 	         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;
+	      cursor_bufpos = pmt_offset + local_prompt_len;
 
 	      if (local_prompt && local_prompt_invis_chars[cursor_linenum] &&
 		    _rl_last_c_pos > 0 &&

patchlevel.h

@@ -25,6 +25,6 @@
    regexp `^#define[ 	]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 16
+#define PATCHLEVEL 17
 
 #endif /* _PATCHLEVEL_H_ */