GNU bug report logs - #13963
24.3; eshell: "Text is read-only" and unresponsive eshell to kill-buffer, C-x C-c and C-x C-q

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: joe M <joe9mail <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; eshell: "Text is read-only" and unresponsive eshell to
	kill-buffer, C-x C-c and C-x C-q
Date: Thu, 14 Mar 2013 15:34:14 -0400

Reproducing the bug:

1. Type something right after the '$' in the prompt without a space. For
example, '$pwd' instead of '$ pwd'. That causes the "Text is read-only"
message.
2. Cannot close out of eshell or emacs when that message appears
3. The only way to close out of eshell/emacs is:
<taylanub> joe9: M-: (let ((inhibit-read-only t)) (kill-this-buffer)) in the
           eshell buffer.
<taylanub> To recover after the bug triggers, that is, not to solve the bug ..
<jlf> joe9: you can also C-x C-e after forms such as taylanub's if you get
      into a situation where M-: doesn't function  [14:59]




If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/usr/share/emacs/24.3/etc/DEBUG.


In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.4)
 of 2013-03-11 on master
Windowing system distributor `The X.Org Foundation', version 11.0.11301000
Configured using:
 `configure '--prefix=/usr' '--build=x86_64-pc-linux-gnu'
 '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man'
 '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
 '--localstatedir=/var/lib' '--libdir=/usr/lib64'
 '--disable-dependency-tracking' '--program-suffix=-emacs-24'
 '--program-transform-name=s/emacs-[0-9].*/emacs-24/'
 '--infodir=/usr/share/info/emacs-24'
 '--enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../lib64'
 '--with-gameuser=games' '--without-compress-info' '--without-hesiod'
 '--without-kerberos' '--without-kerberos5' '--with-gpm' '--with-dbus'
 '--without-gnutls' '--without-xml2' '--without-selinux'
 '--without-wide-int' '--with-sound' '--with-x' '--without-ns'
 '--without-gconf' '--without-gsettings' '--without-toolkit-scroll-bars'
 '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff'
 '--with-xpm' '--without-imagemagick' '--with-xft' '--without-libotf'
 '--without-m17n-flt' '--with-x-toolkit=gtk3'
 'GENTOO_PACKAGE=app-editors/emacs-24.3_rc3'
 'build_alias=x86_64-pc-linux-gnu' 'host_alias=x86_64-pc-linux-gnu'
 'CFLAGS=-O2 -pipe -O2 -pipe -march=corei7-avx -mno-movbe -mno-aes
 -mno-abm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-tbm
 -mno-avx -mtune=corei7-avx' 'LDFLAGS=-Wl,-O1 -Wl,--as-needed'
 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LC_COLLATE: en_US.UTF-8
  value of $LC_CTYPE: en_US.UTF-8
  value of $LC_MESSAGES: en_US.UTF-8
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: EShell

Minor modes in effect:
  global-hl-line-mode: t
  ido-ubiquitous-mode: t
  show-paren-mode: t
  evil-mode: t
  evil-local-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  yas/global-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-fill-mode: 1

Recent input:
: e s h e l l <return> p w d <return> i h i p w d <return>
p w d <return> e x i t <return> <return> M-x r e p
o r t - <return>

Recent messages:
Loading em-basic...done
Loading em-cmpl...done
Loading em-dirs...done
Loading em-glob...done
Loading em-hist...done
Loading em-ls...done
Loading em-prompt...done
Loading em-script...done
Loading em-term...done
Loading em-unix...done

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multi-tty emacs)

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Fri, 15 Mar 2013 08:34:41 +0100

joe M <joe9mail <at> gmail.com> writes:

> Reproducing the bug:
>
> 1. Type something right after the '$' in the prompt without a space. For
> example, '$pwd' instead of '$ pwd'. That causes the "Text is read-only"
> message.
> 2. Cannot close out of eshell or emacs when that message appears
> 3. The only way to close out of eshell/emacs is:
> <taylanub> joe9: M-: (let ((inhibit-read-only t)) (kill-this-buffer)) in the
>            eshell buffer.
> <taylanub> To recover after the bug triggers, that is, not to solve the bug ..
> <jlf> joe9: you can also C-x C-e after forms such as taylanub's if you get
>       into a situation where M-: doesn't function  [14:59]
>
>

The problem I think is that the eshell prompt is read-only but this
doesn't forbid user to write in this zone and because the prompt have
also rear-nonsticky property, the new character entered are made
read-only and eshell when it try to delete this characters return "text
read only".
Didn't look deeper where this happen though.

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sun, 17 Mar 2013 15:47:26 +0100

Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:

> joe M <joe9mail <at> gmail.com> writes:
>
>> Reproducing the bug:
>>
>> 1. Type something right after the '$' in the prompt without a space. For
>> example, '$pwd' instead of '$ pwd'. That causes the "Text is read-only"
>> message.
>> 2. Cannot close out of eshell or emacs when that message appears
>> 3. The only way to close out of eshell/emacs is:
>> <taylanub> joe9: M-: (let ((inhibit-read-only t)) (kill-this-buffer)) in the
>>            eshell buffer.
>> <taylanub> To recover after the bug triggers, that is, not to solve the bug ..
>> <jlf> joe9: you can also C-x C-e after forms such as taylanub's if you get
>>       into a situation where M-: doesn't function  [14:59]
>>
>>
>
> The problem I think is that the eshell prompt is read-only but this
> doesn't forbid user to write in this zone and because the prompt have
> also rear-nonsticky property, the new character entered are made
> read-only and eshell when it try to delete this characters return "text
> read only".
> Didn't look deeper where this happen though.

I resend, it seems the sended patch never arrive here ?

diff --git a/lisp/eshell/em-prompt.el b/lisp/eshell/em-prompt.el
index c1c4d47..bb6f563 100644
--- a/lisp/eshell/em-prompt.el
+++ b/lisp/eshell/em-prompt.el
@@ -119,11 +119,12 @@ arriving, or after."
       (set-marker eshell-last-output-end (point))
     (let ((prompt (funcall eshell-prompt-function)))
       (and eshell-highlight-prompt
-	   (add-text-properties 0 (length prompt)
-				'(read-only t
-				  face eshell-prompt
-				  rear-nonsticky (face read-only))
-				prompt))
+           (add-text-properties 0
+                                ;; Assume `eshell-prompt-function'
+                                ;; add a space at end of prompt.
+                                (1- (length prompt))
+                                '(read-only t face eshell-prompt)
+                                prompt))
       (eshell-interactive-print prompt)))
   (run-hooks 'eshell-after-prompt-hook))

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #14 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sun, 17 Mar 2013 13:18:25 +0100

Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:

> joe M <joe9mail <at> gmail.com> writes:
>
>> Reproducing the bug:
>>
>> 1. Type something right after the '$' in the prompt without a space. For
>> example, '$pwd' instead of '$ pwd'. That causes the "Text is read-only"
>> message.
>> 2. Cannot close out of eshell or emacs when that message appears
>> 3. The only way to close out of eshell/emacs is:
>> <taylanub> joe9: M-: (let ((inhibit-read-only t)) (kill-this-buffer)) in the
>>            eshell buffer.
>> <taylanub> To recover after the bug triggers, that is, not to solve the bug ..
>> <jlf> joe9: you can also C-x C-e after forms such as taylanub's if you get
>>       into a situation where M-: doesn't function  [14:59]
>>
>>
>
> The problem I think is that the eshell prompt is read-only but this
> doesn't forbid user to write in this zone and because the prompt have
> also rear-nonsticky property, the new character entered are made
> read-only and eshell when it try to delete this characters return "text
> read only".
> Didn't look deeper where this happen though.

Fix the problem by making the prompt region read-only.

diff --git a/lisp/eshell/em-prompt.el b/lisp/eshell/em-prompt.el
index c1c4d47..ac3649d 100644
--- a/lisp/eshell/em-prompt.el
+++ b/lisp/eshell/em-prompt.el
@@ -119,11 +119,12 @@ arriving, or after."
       (set-marker eshell-last-output-end (point))
     (let ((prompt (funcall eshell-prompt-function)))
       (and eshell-highlight-prompt
-	   (add-text-properties 0 (length prompt)
-				'(read-only t
-				  face eshell-prompt
-				  rear-nonsticky (face read-only))
-				prompt))
+	   (add-text-properties 0
+                                ;; Assume `eshell-prompt-function'
+                                ;; add a space at end of prompt.
+                                (1- (length prompt))
+                                '(read-only t face eshell-prompt)
+                                prompt))
       (eshell-interactive-print prompt)))
   (run-hooks 'eshell-after-prompt-hook))

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #17 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sat, 23 Mar 2013 11:05:17 +0100

Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:

Problem with previous patch i sent is that it allow to delete backward
the space at end of prompt, so what is needed is make the whole prompt
read-only but the last char (the space) and give to this last char
rear-nonsticky read-only property.
This works fine here and fix the bug.

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #20 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sat, 23 Mar 2013 11:23:48 +0100

Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:

> Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
>
> Problem with previous patch i sent is that it allow to delete backward
> the space at end of prompt, so what is needed is make the whole prompt
> read-only but the last char (the space) and give to this last char
> rear-nonsticky read-only property.
> This works fine here and fix the bug.

diff --git a/lisp/eshell/em-prompt.el b/lisp/eshell/em-prompt.el
index c1c4d47..db6d74c 100644
--- a/lisp/eshell/em-prompt.el
+++ b/lisp/eshell/em-prompt.el
@@ -117,12 +117,17 @@ arriving, or after."
   (run-hooks 'eshell-before-prompt-hook)
   (if (not eshell-prompt-function)
       (set-marker eshell-last-output-end (point))
-    (let ((prompt (funcall eshell-prompt-function)))
+    (let* ((prompt (funcall eshell-prompt-function))
+           (len (length prompt)))
       (and eshell-highlight-prompt
-	   (add-text-properties 0 (length prompt)
+	   (add-text-properties 0 (1- len)
+				'(read-only t
+				  face eshell-prompt)
+				prompt)
+           (add-text-properties (1- len) len
 				'(read-only t
 				  face eshell-prompt
-				  rear-nonsticky (face read-only))
+                                  rear-nonsticky (face read-only))
 				prompt))
       (eshell-interactive-print prompt)))
   (run-hooks 'eshell-after-prompt-hook))

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #23 received at 13963 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Cc: 13963 <at> debbugs.gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sat, 23 Mar 2013 11:58:52 -0400

>> The problem I think is that the eshell prompt is read-only but this
>> doesn't forbid user to write in this zone and because the prompt have
>> also rear-nonsticky property, the new character entered are made
>> read-only and eshell when it try to delete this characters return "text
>> read only".
>> Didn't look deeper where this happen though.

The problem is that the last char of the prompt (the space) should be
rear-nonsticky, but if the others are rear-nonsticky and are not
front-sticky, then indeed you can't erase them but you can insert
anything inside them.  So I think the better fix is to make the prompt
(including the trailing space) both rear-nonsticky and front-sticky.

Does the patch below fix the problem?


        Stefan


=== modified file 'lisp/eshell/em-prompt.el'
--- lisp/eshell/em-prompt.el	2013-01-01 09:11:05 +0000
+++ lisp/eshell/em-prompt.el	2013-03-23 15:57:29 +0000
@@ -122,6 +122,7 @@
 	   (add-text-properties 0 (length prompt)
 				'(read-only t
 				  face eshell-prompt
+				  front-sticky (face read-only)
 				  rear-nonsticky (face read-only))
 				prompt))
       (eshell-interactive-print prompt)))

Message #26 received at 13963 <at> debbugs.gnu.org (full text, mbox):

From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 13963 <at> debbugs.gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Sat, 23 Mar 2013 17:27:25 +0100

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

>>> The problem I think is that the eshell prompt is read-only but this
>>> doesn't forbid user to write in this zone and because the prompt have
>>> also rear-nonsticky property, the new character entered are made
>>> read-only and eshell when it try to delete this characters return "text
>>> read only".
>>> Didn't look deeper where this happen though.
>
> The problem is that the last char of the prompt (the space) should be
> rear-nonsticky, but if the others are rear-nonsticky and are not
> front-sticky, then indeed you can't erase them but you can insert
> anything inside them.  So I think the better fix is to make the prompt
> (including the trailing space) both rear-nonsticky and front-sticky.
>
> Does the patch below fix the problem?
Yes, very good, same behavior than the last patch I sended but much
simpler.

Thanks.

-- 
Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Message #31 received at 13963-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Cc: 13963-done <at> debbugs.gnu.org
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Mon, 25 Mar 2013 20:42:29 -0400

> Yes, very good, same behavior than the last patch I sended but much
> simpler.

Great, thanks, installed,


        Stefan

Message #34 received at 13963 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 13963 <at> debbugs.gnu.org
Cc: monnier <at> iro.umontreal.ca
Subject: Re: bug#13963: 24.3;
	eshell: "Text is read-only" and unresponsive eshell to kill-buffer,
	C-x C-c and C-x C-q
Date: Fri, 29 Mar 2013 22:13:45 -0400

Stefan Monnier wrote:

>> Yes, very good, same behavior than the last patch I sended but much
>> simpler.
>
> Great, thanks, installed,

IMO this should be in emacs-24.

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