Bash-5.3 patch 20: If readline handles a SIGWINCH and updates its idea of the screen dimensions, it needs to recompute the columns where the prompt wraps lines every time, not just when the screen width decreases.

lib/readline/display.c

@@ -3522,8 +3522,9 @@ _rl_redisplay_after_sigwinch (void)
   else
     rl_crlf ();
 
-  if (_rl_screenwidth < prompt_visible_length)
-    _rl_reset_prompt ();		/* update local_prompt_newlines array */
+  /* Let expand_prompt() update local_prompt_newlines and local_prompt_invis_chars
+    arrays */
+  _rl_reset_prompt ();
 
   /* Redraw only the last line of a multi-line prompt. */
   t = strrchr (rl_display_prompt, '\n');

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 19
+#define PATCHLEVEL 20
 
 #endif /* _PATCHLEVEL_H_ */