bug#12165: segmentation fault during run-lisp in emacs-24.1

[Daniel Eliason]

From: "U-HLS\\eliason" <eliason@NY-9KQn6G1.hlit.local>                                               

To: bug-gnu-emacs@gnu.org                                                                            

Subject: 24.1; segmentation fault during run-lisp                                                    

--text follows this line--                                                                            

This bug report will be sent to the Bug-GNU-Emacs mailing list                                       

and the GNU bug tracker at debbugs.gnu.org.  Please check that                                        

the From: line contains a valid email address.  After a delay of up                                  

to one day, you should receive an acknowledgement at that address.                                   

                                                                                                      

Please write in English if possible, as the Emacs maintainers                                        

usually do not have translators for other languages.                                                 

                                                                                                      

Please describe exactly what actions triggered the bug, and                                           

the precise symptoms of the bug.  If you can, give a recipe                                          

starting from `emacs -Q':                                                                            

                                                                                                      

                                                                                                      

                                                                                                      

Segmentation Fault after I use help in *inferior-lisp* buffer.                                       

The sequence here will cause the crash from an 'emacs -Q' startup                                    

at the Cygwin command prompt:                                                                         

(setq inferior-lisp-program "clisp")^J                                                                

M-x run-lisp                                                                                         

^H^G                                                                                                  

(exit)                                                                                               

                                                                                                      

The segmentation violation happens while typing '(exit)'. It happens                                 

at a keystroke, before completing the command and typing return.                                     

                                                                                                      

I downloaded the Emacs sources directly from:                                                        

http://gnu.mirrors.pair.com/gnu/emacs/                                                               

                                                                                                      

I compiled the faulty emacs-24.1 under Cygwin like this:                                             

./configure --without-x                                                                              

make                                                                                                 

                                                                                                      

The Gygwin environment was fully updated on 9-August-2012.                                           

                                                                                                      

I then downloaded and compiled emacs-23.2b, compiled using exactly the                               

same commands, and the problem does *not* occur.  I have currently installed                         

emacs-23.2b for that reason.                                                                          

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

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                                          

/home/eliason/emacs-24.1/etc/DEBUG.                                                                  

                                                                                                      

                                                                                                      

In GNU Emacs 24.1.1 (i686-pc-cygwin)                                                                  

 of 2012-08-09 on NY-9KQn6G1                                                                         

Configured using:                                                                                    

 `configure '--without-x''                                                                            

                                                                                                      

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: Dired by name                                                                            

                                                                                                      

Minor modes in effect:                                                                               

  menu-bar-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                                                                                 

                                                                                                      

Recent input:                                                                                        

ESC [ > 4 1 ; 2 8 1 ; 0 c ESC x r e p o r t - e m a                                                  

c s - b u f C-h g RET C-x o C-x o C-x o C-x k C-x o                                                  

ESC x ESC O A r e p o r t - b C-h e m a C-h C-h C-g                                                  

C-g C-x 0 C-x o C-h C-g C-g C-b ESC x r e o r t C-b                                                  

C-b C-b p C-e - e m a c s - b u g RET                                                                 

                                                                                                      

Recent messages:                                                                                     

("emacs")                                                                                             

For information about GNU Emacs and the GNU system, type C-h C-a.                                    

View mode: type C-h for help, h for commands, q to quit.                                              

completing-read-default: Command attempted to use minibuffer while in minibuffer                     

goto-history-element: Beginning of history; no preceding item                                        

maQuit                                                                                                

Quit                                                                                                 

                                                                                                      

Load-path shadows:                                                                                   

None found.                                                                                          

                                                                                                      

Features:                                                                                            

(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml                              

mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev                                  

gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util                                     

mail-prsvr mail-utils help-mode easymenu goto-addr thingatpt image view                              

tool-bar dired regexp-opt time-date ediff-hook vc-hooks lisp-float-type                              

lisp-mode register page menu-bar rfn-eshadow timer 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 multi-tty emacs)