GNU bug report logs - #4282
23.1.50; gdb-mi.el: (wrong-type-argument stringp nil) when using watchpoints

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Matthieu Moy <Matthieu.Moy <at> imag.fr>
Subject: bug#4282: marked as done (23.1.50; gdb-mi.el: (wrong-type-argument
 stringp nil) when using watchpoints)
Date: Mon, 31 Aug 2009 14:00:07 +0000

[Message part 1 (text/plain, inline)]

Your message dated Mon, 31 Aug 2009 15:53:22 +0200
with message-id <vpqocpwt7hp.fsf <at> bauges.imag.fr>
and subject line Re: bug#4282: 23.1.50; gdb-mi.el: (wrong-type-argument stringp nil) when using watchpoints
has caused the Emacs bug report #4282,
regarding 23.1.50; gdb-mi.el: (wrong-type-argument stringp nil) when using watchpoints
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
4282: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4282
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Matthieu Moy <Matthieu.Moy <at> imag.fr>
To: emacs-pretest-bug <at> gnu.org
Cc: Nick Roberts <nickrob <at> gnu.org>
Subject: 23.1.50; gdb-mi.el: (wrong-type-argument stringp nil) when using watchpoints
Date: Fri, 28 Aug 2009 13:55:55 +0200

Hi,

I'm having trouble with gdb-mi and watchpoints (i.e. "watch" command at
the gdb prompt).

Steps to reproduce (I'm posting from an Emacs instance where I just
reproduced this):

$ cat main.c 
int main () {
	int i;
	i++;
	i++;
}
$ gcc main.c -g
$ emacs -Q main.c

Then, within Emacs:

* Launch M-x gdb RET once.
* Quit this first *gud* buffer (C-x k)
* Launch M-x gdb RET once more (yes, that's strange, but it doesn't
  crash in the first instance, only in the next one!)
* M-x toggle-debug-on-error RET
* In the *gud-a.out* buffer:

(gdb) b main
Breakpoint 1 at 0x8048335: file main.c, line 3.
(gdb) r
Starting program: /tmp/a.out 

Breakpoint 1, main () at main.c:3
3		i++;
(gdb) watch i
Hardware watchpoint 2: i

Then, I get this backtrace (and it keeps giving the same error for
anything done in this *gud* buffer afterwards):

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  propertize(nil font-lock-face font-lock-function-name-face)
  gdb-breakpoints-list-handler-custom()
  gdb-breakpoints-list-handler()
  apply(gdb-breakpoints-list-handler nil)
  (save-current-buffer (set-buffer #<buffer *breakpoints of a.out*>) (apply (quote gdb-breakpoints-list-handler) args))
  (with-current-buffer #<buffer *breakpoints of a.out*> (apply (quote gdb-breakpoints-list-handler) args))
  (lambda (&rest args) (with-current-buffer #<buffer *breakpoints of a.out*> (apply ... args)))()
  gdb-done-or-error("BreakpointTable={nr_rows=\"2\",nr_cols=\"6\",hdr=[{width=\"7\",alignment=\"-1\",col_name=\"number\",colhdr=\"Num\"},{width=\"14\",alignment=\"-1\",col_name=\"type\",colhdr=\"Type\"},{width=\"4\",alignment=\"-1\",col_name=\"disp\",colhdr=\"Disp\"},{width=\"3\",alignment=\"-1\",col_name=\"enabled\",colhdr=\"Enb\"},{width=\"10\",alignment=\"-1\",col_name=\"addr\",colhdr=\"Address\"},{width=\"40\",alignment=\"2\",col_name=\"what\",colhdr=\"What\"}],body=[bkpt={number=\"1\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\",times=\"1\"},bkpt={number=\"2\",type=\"hw watchpoint\",disp=\"keep\",enabled=\"y\",addr=\"\",what=\"i\",times=\"0\"}]}" "18" done)
  gud-gdbmi-marker-filter("17^error,msg=\"Undefined mi command: thread-info (missing implementation)\"\n(gdb) \n18^done,BreakpointTable={nr_rows=\"2\",nr_cols=\"6\",hdr=[{width=\"7\",alignment=\"-1\",col_name=\"number\",colhdr=\"Num\"},{width=\"14\",alignment=\"-1\",col_name=\"type\",colhdr=\"Type\"},{width=\"4\",alignment=\"-1\",col_name=\"disp\",colhdr=\"Disp\"},{width=\"3\",alignment=\"-1\",col_name=\"enabled\",colhdr=\"Enb\"},{width=\"10\",alignment=\"-1\",col_name=\"addr\",colhdr=\"Address\"},{width=\"40\",alignment=\"2\",col_name=\"what\",colhdr=\"What\"}],body=[bkpt={number=\"1\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\",times=\"1\"},bkpt={number=\"2\",type=\"hw watchpoint\",disp=\"keep\",enabled=\"y\",addr=\"\",what=\"i\",times=\"0\"}]}\n(gdb) \n19^done,frame={level=\"0\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\"}\n(gdb) \n")
  apply(gud-gdbmi-marker-filter "17^error,msg=\"Undefined mi command: thread-info (missing implementation)\"\n(gdb) \n18^done,BreakpointTable={nr_rows=\"2\",nr_cols=\"6\",hdr=[{width=\"7\",alignment=\"-1\",col_name=\"number\",colhdr=\"Num\"},{width=\"14\",alignment=\"-1\",col_name=\"type\",colhdr=\"Type\"},{width=\"4\",alignment=\"-1\",col_name=\"disp\",colhdr=\"Disp\"},{width=\"3\",alignment=\"-1\",col_name=\"enabled\",colhdr=\"Enb\"},{width=\"10\",alignment=\"-1\",col_name=\"addr\",colhdr=\"Address\"},{width=\"40\",alignment=\"2\",col_name=\"what\",colhdr=\"What\"}],body=[bkpt={number=\"1\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\",times=\"1\"},bkpt={number=\"2\",type=\"hw watchpoint\",disp=\"keep\",enabled=\"y\",addr=\"\",what=\"i\",times=\"0\"}]}\n(gdb) \n19^done,frame={level=\"0\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\"}\n(gdb) \n")
  gud-marker-filter("17^error,msg=\"Undefined mi command: thread-info (missing implementation)\"\n(gdb) \n18^done,BreakpointTable={nr_rows=\"2\",nr_cols=\"6\",hdr=[{width=\"7\",alignment=\"-1\",col_name=\"number\",colhdr=\"Num\"},{width=\"14\",alignment=\"-1\",col_name=\"type\",colhdr=\"Type\"},{width=\"4\",alignment=\"-1\",col_name=\"disp\",colhdr=\"Disp\"},{width=\"3\",alignment=\"-1\",col_name=\"enabled\",colhdr=\"Enb\"},{width=\"10\",alignment=\"-1\",col_name=\"addr\",colhdr=\"Address\"},{width=\"40\",alignment=\"2\",col_name=\"what\",colhdr=\"What\"}],body=[bkpt={number=\"1\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\",times=\"1\"},bkpt={number=\"2\",type=\"hw watchpoint\",disp=\"keep\",enabled=\"y\",addr=\"\",what=\"i\",times=\"0\"}]}\n(gdb) \n19^done,frame={level=\"0\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\"}\n(gdb) \n")
  gud-filter(#<process gud-a.out> "17^error,msg=\"Undefined mi command: thread-info (missing implementation)\"\n(gdb) \n18^done,BreakpointTable={nr_rows=\"2\",nr_cols=\"6\",hdr=[{width=\"7\",alignment=\"-1\",col_name=\"number\",colhdr=\"Num\"},{width=\"14\",alignment=\"-1\",col_name=\"type\",colhdr=\"Type\"},{width=\"4\",alignment=\"-1\",col_name=\"disp\",colhdr=\"Disp\"},{width=\"3\",alignment=\"-1\",col_name=\"enabled\",colhdr=\"Enb\"},{width=\"10\",alignment=\"-1\",col_name=\"addr\",colhdr=\"Address\"},{width=\"40\",alignment=\"2\",col_name=\"what\",colhdr=\"What\"}],body=[bkpt={number=\"1\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\",times=\"1\"},bkpt={number=\"2\",type=\"hw watchpoint\",disp=\"keep\",enabled=\"y\",addr=\"\",what=\"i\",times=\"0\"}]}\n(gdb) \n19^done,frame={level=\"0\",addr=\"0x08048335\",func=\"main\",file=\"main.c\",fullname=\"/tmp/main.c\",line=\"3\"}\n(gdb) \n")


In GNU Emacs 23.1.50.2 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
 of 2009-08-28 on bauges
Windowing system distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure  '--prefix=/home/moy/local/usr/''

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

Major mode: Debugger

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: (only . t)

Recent input:
M-x g d b <return> <return> C-x k <return> y e s <return> 
M-x g d b <return> <return> M-x t o g <tab> d e <tab> 
e <tab> <return> b SPC m a i n <return> r <return> 
w a t c h SPC i <return> <help-echo> M-x r e p o <tab> 
r <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Loading vc-git...done
Debug on Error enabled globally
Entering debugger...
Making completion list...
call-interactively: Buffer is read-only: #<buffer *Backtrace*>

Load-path shadows:
None found.

-- 
Matthieu

[Message part 3 (message/rfc822, inline)]

From: Matthieu Moy <Matthieu.Moy <at> imag.fr>
To: nickrob <at> snap.net.nz (Nick Roberts)
Cc: 4282-done <at> debbugs.gnu.org, emacs-pretest-bug <at> gnu.org
Subject: Re: bug#4282: 23.1.50; gdb-mi.el: (wrong-type-argument stringp nil) when using watchpoints
Date: Mon, 31 Aug 2009 15:53:22 +0200

nickrob <at> snap.net.nz (Nick Roberts) writes:

>  > I'm having trouble with gdb-mi and watchpoints (i.e. "watch" command at
>  > the gdb prompt).
>
> I think I've fixed this now.  If it works for you can you please close the bug report.

Yes, this is fixed by:

commit cfab2770ddd843963622e80cfacccbb9083b262c
Author: Nick Roberts <nickrob <at> snap.net.nz>
Date:   Mon Aug 31 12:35:55 2009 +0000

Thanks,

-- 
Matthieu

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