Subject: bug#9858: closed (Re: bug#9858: 24.0.90; M-x gdb breaks if gdb-show-main is non-nil but there's no file loaded)

From: [email-masked] (GNU bug Tracking System)
Date: Wed, 30 Nov 2011 03:29:02 +0000

Your bug report

#9858: 24.0.90; M-x gdb breaks if gdb-show-main is non-nil but there's no file loaded

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
9858: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9858
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#9858: 24.0.90; M-x gdb breaks if gdb-show-main is non-nil but there's no file loaded
From: Ken Brown <[email-masked]>
To: [email-masked]
Date: Tue, 29 Nov 2011 22:28:40 -0500
List-Id: <debbugs-submit.debbugs.gnu.org>

On 10/24/2011 3:23 PM, Ken Brown wrote:
> The following patch seems to fix it. OK to apply?

Patch applied.  Closing bug.

Subject: 24.0.90; M-x gdb breaks if gdb-show-main is non-nil but there's no file loaded
From: Ken Brown <[email-masked]>
To: [email-masked]
Date: Mon, 24 Oct 2011 12:10:04 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

The info node GDB Graphical Interface File > GDB User Interface Layout 
suggests setting the (customizable) variable gdb-show-main non-nil in 
order to have the source buffer displayed on startup of M-x gdb.  But if 
you do this and then run M-x gdb without specifying a file to debug, M-x 
gdb doesn't initialize properly, and the *Messages* buffer contains

error in process filter: gud-find-file: Wrong type argument: stringp, nil

I think M-x gdb should just start up normally in this situation, perhaps 
with a message that there's no source file.

To reproduce:

emacs -Q
M-: (setq gdb-show-main t) <ret>
M-x gdb <delete any file name in the prompt> <return>

In GNU Emacs 24.0.90.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.22.0)
  of 2011-10-24 on moufangfedora
Windowing system distributor `Fedora Project', version 11.0.10905000
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: nil
   value of $XMODIFIERS: @im=none
   locale-coding-system: nil
   default enable-multibyte-characters: t

Major mode: Fundamental

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

Recent input:
M-x s e t - v a <tab> <return> g d b - s h o w - m
a i n <return> C-g M-: ( s e t q SPC g d b - s h o
w - m a i n SPC t ) <return> M-x g d b <return> <M-backspace>
<M-backspace> <return> C-x b * M <tab> <return> M-x
r e p o r <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Quit
t
error in process filter: gud-find-file: Wrong type argument: stringp, nil
error in process filter: Wrong type argument: stringp, nil

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr message format-spec rfc822 mml easymenu
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mailabbrev mail-utils gmm-utils mailheader
emacsbug gdb-mi bindat json gud easy-mmode comint regexp-opt ring
help-fns time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd tool-bar dnd fontset image fringe lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty emacs)