diff mbox series

bash: Update to version 5.3 patch-20

Message ID 20260922172417.3447503-1-adolf.belka@ipfire.org
State New
Headers
Series bash: Update to version 5.3 patch-20 |

Commit Message

Adolf Belka 22 Sep 2026, 5:24 p.m. UTC 
- Update from version 5.3 patch-15 to 5.3 patch-20
- No change in rootfile
- Changelog
Patch-20
	If readline handles a SIGWINCH and resizes 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.
Patch-19
	On some systems, macOS in particular, isalpha(3) returns true for bytes
	between 128 and 255. Bash uses this to determine whether or not these
	characters are permitted to be part of a shell identifier, and can
	consume one byte too many when determining the end of a variable name.
Patch-18
	This patch fixes two problems with the redisplay code. The first is a
	crash that results if the initial prompt contains more than 256 wrapped
	lines. The second is a fix to the redisplay code when the first several
	characters of the prompt string are identical, but the prompt has changed
	and needs to be redrawn. If these first few characters are part of an escape
	sequence, the entire sequence needs to be redrawn.
Patch-17
	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-16
	On recent versions of macOS, the pipe size is dynamic and changes due to
	system-wide total pipe usage, so we have to check whether or not bash can
	use the size determined at compile time.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
---
 lfs/bash                    |   2 +-
 src/patches/bash/bash53-016 | 136 ++++++++++++++++++++++++++++++++++++
 src/patches/bash/bash53-017 |  62 ++++++++++++++++
 src/patches/bash/bash53-018 |  71 +++++++++++++++++++
 src/patches/bash/bash53-019 | 133 +++++++++++++++++++++++++++++++++++
 src/patches/bash/bash53-020 |  51 ++++++++++++++
 6 files changed, 454 insertions(+), 1 deletion(-)
 create mode 100644 src/patches/bash/bash53-016
 create mode 100644 src/patches/bash/bash53-017
 create mode 100644 src/patches/bash/bash53-018
 create mode 100644 src/patches/bash/bash53-019
 create mode 100644 src/patches/bash/bash53-020
diff mbox series

Patch

diff --git a/lfs/bash b/lfs/bash
index dbee213c2..245aaa791 100644
--- a/lfs/bash
+++ b/lfs/bash
@@ -25,7 +25,7 @@ 
 include Config
 
 VER        = 5.3
-PATCHVER   = 15
+PATCHVER   = 20
 
 THISAPP    = bash-$(VER)
 DL_FILE    = $(THISAPP).tar.gz
diff --git a/src/patches/bash/bash53-016 b/src/patches/bash/bash53-016
new file mode 100644
index 000000000..6aff3244c
--- /dev/null
+++ b/src/patches/bash/bash53-016
@@ -0,0 +1,136 @@ 
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.3
+Patch-ID:	bash53-016
+
+Bug-Reported-by:	Ethan Pini <ethan@pini.dev>
+Bug-Reference-ID:	<sm8ZxfcmgU7_eiVLIsjNlax7oyAwwe1_uk2vaO0hp6nypbGnV7WStfE3rrHg_RV8BMSNRhhQmS2-7TpvzPxuK1NLLEWAyL9kbsZ2cA3nqIg=@pini.dev>
+Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-bash/2026-06/msg00126.html
+
+Bug-Description:
+
+On recent versions of macOS, the pipe size is dynamic and changes due to
+system-wide total pipe usage, so we have to check whether or not bash can
+use the size determined at compile time.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-5.3-patched/redir.c	Fri Mar  7 18:49:37 2025
+--- redir.c	Tue Jul  7 11:21:09 2026
+***************
+*** 473,477 ****
+--- 473,500 ----
+  #endif
+  
++ #if defined (PIPESIZE_DYNAMIC)
++       /* If we can't count on the pipe size determined at compile time to be
++ 	 constant across systems, define PIPESIZE_DYNAMIC in configure.ac.
++ 	 We set the pipe's write end to be non-blocking, try to write, and
++ 	 fall back to a temp file on error. */
++       if (sh_setnodelay (herepipe[1]) < 0)
++ 	{
++ 	  close (herepipe[0]);
++ 	  close (herepipe[1]);
++ 	  goto use_tempfile;
++ 	}
++ #endif
++       
+        r = heredoc_write (herepipe[1], document, document_len);
++ 
++ #if defined (PIPESIZE_DYNAMIC)
++       if (r == ENOSPC || r == EAGAIN)
++ 	{
++ 	  close (herepipe[0]);
++ 	  close (herepipe[1]);
++ 	  goto use_tempfile;
++ 	}
++ #endif
++ 	  
+        if (document != redirectee->word)
+  	free (document);
+*** ../bash-5.3-patched/general.c	Wed Jun 25 15:54:35 2025
+--- general.c	Tue Jul  7 11:12:10 2026
+***************
+*** 596,599 ****
+--- 596,620 ----
+  }
+  
++ int
++ sh_setnodelay (int fd)
++ {
++   int flags;
++ 
++   if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
++     return -1;
++ 
++   /* This is defined to O_NDELAY in filecntl.h if O_NONBLOCK is not present
++      and O_NDELAY is defined. */
++ #ifdef O_NONBLOCK
++   flags |= O_NONBLOCK;
++ #endif
++ 
++ #ifdef O_NDELAY
++   flags |= O_NDELAY;
++ #endif
++ 
++   return (fcntl (fd, F_SETFL, flags));
++ }
++ 
+  /* Just a wrapper for the define in include/filecntl.h */
+  int
+*** ../bash-5.3-patched/general.h	Wed Jun 25 15:52:47 2025
+--- general.h	Tue Jul  7 11:13:48 2026
+***************
+*** 318,321 ****
+--- 318,322 ----
+  
+  extern int sh_unset_nodelay_mode (int);
++ extern int sh_setnodelay (int);
+  extern int sh_setclexec (int);
+  extern int sh_validfd (int);
+*** ../bash-5.3-patched/configure.ac	Mon Jun 30 10:05:24 2025
+--- configure.ac	Tue Jul  7 11:25:32 2026
+***************
+*** 1210,1214 ****
+  isc*)		LOCAL_CFLAGS=-Disc386 ;;
+  rhapsody*)	LOCAL_CFLAGS=-DRHAPSODY ;;
+! darwin*)	LOCAL_CFLAGS=-DMACOSX ;;
+  sco3.2v5*)	LOCAL_CFLAGS="-b elf -DWAITPID_BROKEN -DPATH_MAX=1024" ;;
+  sco3.2v4*)	LOCAL_CFLAGS="-DMUST_UNBLOCK_CHLD -DPATH_MAX=1024" ;;
+--- 1210,1214 ----
+  isc*)		LOCAL_CFLAGS=-Disc386 ;;
+  rhapsody*)	LOCAL_CFLAGS=-DRHAPSODY ;;
+! darwin*)	LOCAL_CFLAGS="-DMACOSX -DPIPESIZE_DYNAMIC" ;;
+  sco3.2v5*)	LOCAL_CFLAGS="-b elf -DWAITPID_BROKEN -DPATH_MAX=1024" ;;
+  sco3.2v4*)	LOCAL_CFLAGS="-DMUST_UNBLOCK_CHLD -DPATH_MAX=1024" ;;
+*** ../bash-5.3-patched/configure	Mon Jun 30 10:05:30 2025
+--- configure	Tue Jul  7 11:25:36 2026
+***************
+*** 23134,23138 ****
+  isc*)		LOCAL_CFLAGS=-Disc386 ;;
+  rhapsody*)	LOCAL_CFLAGS=-DRHAPSODY ;;
+! darwin*)	LOCAL_CFLAGS=-DMACOSX ;;
+  sco3.2v5*)	LOCAL_CFLAGS="-b elf -DWAITPID_BROKEN -DPATH_MAX=1024" ;;
+  sco3.2v4*)	LOCAL_CFLAGS="-DMUST_UNBLOCK_CHLD -DPATH_MAX=1024" ;;
+--- 23134,23138 ----
+  isc*)		LOCAL_CFLAGS=-Disc386 ;;
+  rhapsody*)	LOCAL_CFLAGS=-DRHAPSODY ;;
+! darwin*)	LOCAL_CFLAGS="-DMACOSX -DPIPESIZE_DYNAMIC" ;;
+  sco3.2v5*)	LOCAL_CFLAGS="-b elf -DWAITPID_BROKEN -DPATH_MAX=1024" ;;
+  sco3.2v4*)	LOCAL_CFLAGS="-DMUST_UNBLOCK_CHLD -DPATH_MAX=1024" ;;
+*** ../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 15
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 16
+  
+  #endif /* _PATCHLEVEL_H_ */
diff --git a/src/patches/bash/bash53-017 b/src/patches/bash/bash53-017
new file mode 100644
index 000000000..68617967e
--- /dev/null
+++ b/src/patches/bash/bash53-017
@@ -0,0 +1,62 @@ 
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.3
+Patch-ID:	bash53-017
+
+Bug-Reported-by:	Lennart Ackermans <lennart@ackermans.ch>
+Bug-Reference-ID:	<d6f36c30-633a-4e5e-8212-806db6441bf1@ackermans.ch>
+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_ */
diff --git a/src/patches/bash/bash53-018 b/src/patches/bash/bash53-018
new file mode 100644
index 000000000..070e60d64
--- /dev/null
+++ b/src/patches/bash/bash53-018
@@ -0,0 +1,71 @@ 
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.3
+Patch-ID:	bash53-018
+
+Bug-Reported-by:	Ben Kallus <benjamin.p.kallus.gr@dartmouth.edu>
+			Derek Schrock <dereks@lifeofadishwasher.com>
+Bug-Reference-ID:	<CAB6pCSaUPimkEbQwTTkxD5vV14ZJRGCeK2W1ur8RqT1rPrd+Gw@mail.gmail.com>
+			<ajC1pZAV_95J3vsJ@ircbsd.lifeofadishwasher.com>
+Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-readline/2026-06/msg00005.html
+			https://lists.gnu.org/archive/html/bug-readline/2026-06/msg00002.html
+
+Bug-Description:
+
+Patch (apply with `patch -p0'):
+
+This patch fixes two problems with the redisplay code. The first is a
+crash that results if the initial prompt contains more than 256 wrapped
+lines. The second is a fix to the redisplay code when the first several
+characters of the prompt string are identical, but the prompt has changed
+and needs to be redrawn. If these first few characters are part of an escape
+sequence, the entire sequence needs to be redrawn.
+
+*** ../bash-5.3-patched/lib/readline/display.c	Fri May 22 14:55:01 2026
+--- lib/readline/display.c	Fri Jun 26 11:08:53 2026
+***************
+*** 1025,1028 ****
+--- 1025,1029 ----
+  	{
+  	  temp = local_prompt_newlines[newlines+1];
++ 	  CHECK_INV_LBREAKS ();
+  	  inv_lbreaks[++newlines] = temp;
+  	}  
+***************
+*** 2262,2270 ****
+    nd = nfd - new;	/* nd, od are buffer indexes */
+    if (current_line == 0 && !_rl_horizontal_scroll_mode &&
+!       _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 &&
+        (((od > 0 || nd > 0) && (od <= prompt_last_invisible || nd <= prompt_last_invisible)) ||
+  		((od >= lendiff) && _rl_last_c_pos < PROMPT_ENDING_INDEX)))
+      {
+!       _rl_cr ();
+        if (modmark)
+  	_rl_output_some_chars ("*", 1);
+--- 2266,2275 ----
+    nd = nfd - new;	/* nd, od are buffer indexes */
+    if (current_line == 0 && !_rl_horizontal_scroll_mode &&
+!       _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos >= 0 &&
+        (((od > 0 || nd > 0) && (od <= prompt_last_invisible || nd <= prompt_last_invisible)) ||
+  		((od >= lendiff) && _rl_last_c_pos < PROMPT_ENDING_INDEX)))
+      {
+!       if (_rl_last_c_pos > 0)
+! 	_rl_cr ();
+        if (modmark)
+  	_rl_output_some_chars ("*", 1);
+*** ../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 17
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 18
+  
+  #endif /* _PATCHLEVEL_H_ */
diff --git a/src/patches/bash/bash53-019 b/src/patches/bash/bash53-019
new file mode 100644
index 000000000..e70e5e995
--- /dev/null
+++ b/src/patches/bash/bash53-019
@@ -0,0 +1,133 @@ 
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.3
+Patch-ID:	bash53-019
+
+Bug-Reported-by:	zheng <charname@qq.com>
+Bug-Reference-ID:	<tencent_19D6EE3366FEA3EF2C5FD6C23DF303156D09@qq.com>
+Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-bash/2026-08/msg00010.html
+
+Bug-Description:
+
+On some systems, macOS in particular, isalpha(3) returns true for bytes
+between 128 and 255. Bash uses this to determine whether or not these
+characters are permitted to be part of a shell identifier, and can
+consume one byte too many when determining the end of a variable name.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-5.3-patched/syntax.h	Mon Sep 14 10:20:05 2020
+--- syntax.h	Thu Aug  6 14:11:25 2026
+***************
+*** 64,67 ****
+--- 64,69 ----
+  #define CSUBSTOP	0x1000	/* values of OP for ${word[:]OPstuff} */
+  #define CBLANK		0x2000	/* whitespace (blank) character */
++ #define CNAME		0x4000	/* POSIX name character ([_0-9a-zA-Z]) */
++ #define CNAMESTART	0x8000	/* POSIX name start character ([_a-zA-Z]) */
+  
+  /* Defines for use by the rest of the shell. */
+*** ../bash-5.3-patched/mksyntax.c	Thu May 16 15:35:55 2024
+--- mksyntax.c	Wed Aug  5 15:27:45 2026
+***************
+*** 61,64 ****
+--- 61,66 ----
+  	{ CSUBSTOP,	"CSUBSTOP" },
+  	{ CBLANK,	"CBLANK" },
++ 	{ CNAME,	"CNAME" },
++ 	{ CNAMESTART,	"CNAMESTART" }
+  };
+  	
+***************
+*** 199,202 ****
+--- 201,243 ----
+  }
+  
++ static void
++ setnamechars(void)
++ {
++   lsyntax['_'] |= CNAME|CNAMESTART;
++ 
++   lsyntax['0'] |= CNAME; lsyntax['1'] |= CNAME; lsyntax['2'] |= CNAME;
++   lsyntax['3'] |= CNAME; lsyntax['4'] |= CNAME; lsyntax['5'] |= CNAME;
++   lsyntax['6'] |= CNAME; lsyntax['7'] |= CNAME; lsyntax['8'] |= CNAME;
++   lsyntax['9'] |= CNAME;
++ 
++   lsyntax['a'] |= CNAME|CNAMESTART; lsyntax['b'] |= CNAME|CNAMESTART;
++   lsyntax['c'] |= CNAME|CNAMESTART; lsyntax['d'] |= CNAME|CNAMESTART;
++   lsyntax['e'] |= CNAME|CNAMESTART; lsyntax['f'] |= CNAME|CNAMESTART;
++   lsyntax['g'] |= CNAME|CNAMESTART; lsyntax['h'] |= CNAME|CNAMESTART;
++   lsyntax['i'] |= CNAME|CNAMESTART; lsyntax['j'] |= CNAME|CNAMESTART;
++   lsyntax['k'] |= CNAME|CNAMESTART; lsyntax['l'] |= CNAME|CNAMESTART;
++   lsyntax['m'] |= CNAME|CNAMESTART; lsyntax['n'] |= CNAME|CNAMESTART;
++   lsyntax['o'] |= CNAME|CNAMESTART; lsyntax['p'] |= CNAME|CNAMESTART;
++   lsyntax['q'] |= CNAME|CNAMESTART; lsyntax['r'] |= CNAME|CNAMESTART;
++   lsyntax['s'] |= CNAME|CNAMESTART; lsyntax['t'] |= CNAME|CNAMESTART;
++   lsyntax['u'] |= CNAME|CNAMESTART; lsyntax['v'] |= CNAME|CNAMESTART;
++   lsyntax['w'] |= CNAME|CNAMESTART; lsyntax['x'] |= CNAME|CNAMESTART;
++   lsyntax['y'] |= CNAME|CNAMESTART; lsyntax['z'] |= CNAME|CNAMESTART;
++ 
++   lsyntax['A'] |= CNAME|CNAMESTART; lsyntax['B'] |= CNAME|CNAMESTART;
++   lsyntax['C'] |= CNAME|CNAMESTART; lsyntax['D'] |= CNAME|CNAMESTART;
++   lsyntax['E'] |= CNAME|CNAMESTART; lsyntax['F'] |= CNAME|CNAMESTART;
++   lsyntax['G'] |= CNAME|CNAMESTART; lsyntax['H'] |= CNAME|CNAMESTART;
++   lsyntax['I'] |= CNAME|CNAMESTART; lsyntax['J'] |= CNAME|CNAMESTART;
++   lsyntax['K'] |= CNAME|CNAMESTART; lsyntax['L'] |= CNAME|CNAMESTART;
++   lsyntax['M'] |= CNAME|CNAMESTART; lsyntax['N'] |= CNAME|CNAMESTART;
++   lsyntax['O'] |= CNAME|CNAMESTART; lsyntax['P'] |= CNAME|CNAMESTART;
++   lsyntax['Q'] |= CNAME|CNAMESTART; lsyntax['R'] |= CNAME|CNAMESTART;
++   lsyntax['S'] |= CNAME|CNAMESTART; lsyntax['T'] |= CNAME|CNAMESTART;
++   lsyntax['U'] |= CNAME|CNAMESTART; lsyntax['V'] |= CNAME|CNAMESTART;
++   lsyntax['W'] |= CNAME|CNAMESTART; lsyntax['X'] |= CNAME|CNAMESTART;
++   lsyntax['Y'] |= CNAME|CNAMESTART; lsyntax['Z'] |= CNAME|CNAMESTART;
++ }
++ 
+  /* load up the correct flag values in lsyntax */
+  static void
+***************
+*** 235,238 ****
+--- 276,281 ----
+  
+    addblanks ();
++ 
++   setnamechars ();
+  }
+  
+*** ../bash-5.3-patched/general.h	Tue Jul  7 11:13:48 2026
+--- general.h	Thu Aug  6 14:07:22 2026
+***************
+*** 111,116 ****
+  
+  /* Define exactly what a legal shell identifier consists of. */
+! #define legal_variable_starter(c) (ISALPHA(c) || (c == '_'))
+! #define legal_variable_char(c)	(ISALNUM(c) || c == '_')
+  
+  /* Definitions used in subst.c and by the `read' builtin for field
+--- 111,121 ----
+  
+  /* Define exactly what a legal shell identifier consists of. */
+! #if 0
+! #define legal_variable_starter(c) (c < 128 && (ISALPHA(c) || c == '_'))
+! #define legal_variable_char(c)	(c < 128 && (ISALNUM(c) || c == '_'))
+! #else
+! #define legal_variable_starter(c) (sh_syntaxtab[c] & CNAMESTART)
+! #define legal_variable_char(c)	(sh_syntaxtab[c] & CNAME)
+! #endif
+  
+  /* Definitions used in subst.c and by the `read' builtin for field
+*** ../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 18
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 19
+  
+  #endif /* _PATCHLEVEL_H_ */
diff --git a/src/patches/bash/bash53-020 b/src/patches/bash/bash53-020
new file mode 100644
index 000000000..1e27d19bd
--- /dev/null
+++ b/src/patches/bash/bash53-020
@@ -0,0 +1,51 @@ 
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	5.3
+Patch-ID:	bash53-020
+
+Bug-Reported-by:	Félix Bouynot <felix.bouynot@setenforce.one>
+Bug-Reference-ID:	<39c9472ddcf23881693380c4b895dd3799b45cec.camel@setenforce.one>
+Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-bash/2026-05/msg00065.html
+
+Bug-Description:
+
+If readline handles a SIGWINCH and resizes 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.
+
+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
+***************
+*** 3526,3531 ****
+      rl_crlf ();
+  
+!   if (_rl_screenwidth < prompt_visible_length)
+!     _rl_reset_prompt ();		/* update local_prompt_newlines array */
+  
+    /* Redraw only the last line of a multi-line prompt. */
+--- 3521,3527 ----
+      rl_crlf ();
+  
+!   /* 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. */
+*** ../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 19
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 20
+  
+  #endif /* _PATCHLEVEL_H_ */