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Font changes don't work in CVS emacs and sometimes cause segfaults.


From: Alex Coventry
Subject: Font changes don't work in CVS emacs and sometimes cause segfaults.
Date: Thu, 05 Jun 2003 10:05:14 -0400

Symptoms:

Hi.  I just checked out the latest CVS tree and rebuilt because I was
having trouble changing fonts as it was (set-frame-font was having no
effect on layout other than to increase the space devoted to the
minibuffer.)  Now with my usual dotfiles, emacs is segfaulting when I
try to change fonts with S-Mouse1, but just having no apparent effect
when I try to change fonts with set-frame-font.  With "emacs -q", both
methods simply have no apparent effect.  With 

emacs -q -l admin/elisp/dotfiles/XForEmacs.el

(which loads just the file containing most of my X configuration,)
changing fonts changes the *window size* of emacs without changing the
actual font.

I'm sorry I can't debug this further at the moment.  I can provide more
information, including all my emacs dotfiles, if they would be helpful.
Below is the stacktrace from the case where emacs segfaults.

Alex.

Starting program: /scratch2/alex/bin/emacs 

Program received signal SIGSEGV, Segmentation fault.
0x080740ec in display_line (it=0xbfffe4f0) at xdisp.c:14301
14301                 row->glyphs[TEXT_AREA]->charpos = -1;
(gdb) ba
#0  0x080740ec in display_line (it=0xbfffe4f0) at xdisp.c:14301
#1  0x0806faf9 in try_window (window=1213255712, pos={charpos = -1073748752, 
bytepos = -1073748880}) at xdisp.c:12026
#2  0x0806f45c in redisplay_window (window=1213255712, just_this_one_p=0) at 
xdisp.c:11684
#3  0x0806bce9 in redisplay_window_0 (window=1213255712) at xdisp.c:10447
#4  0x0812eb98 in internal_condition_case_1 (bfun=0x806bcbc 
<redisplay_window_0>, arg=1213255712, handlers=1479443156, hfun=0x806bca0 
<redisplay_window_error>)
    at eval.c:1374
#5  0x0806bc9e in redisplay_windows (window=141479608) at xdisp.c:10426
#6  0x0806aed1 in redisplay_internal (preserve_echo_area=0) at xdisp.c:10015
#7  0x0806a2ed in redisplay () at xdisp.c:9442
#8  0x080d9ec9 in read_char (commandflag=1, nmaps=2, maps=0xbffff2c0, 
prev_event=405478628, used_mouse_menu=0xbffff2f8) at keyboard.c:2495
#9  0x080e011a in read_key_sequence (keybuf=0xbffff420, bufsize=30, 
prompt=405478628, dont_downcase_last=0, can_return_switch_frame=1, 
fix_current_buffer=1)
    at keyboard.c:8816
#10 0x080d6e58 in command_loop_1 () at keyboard.c:1504
#11 0x0812ea9e in internal_condition_case (bfun=0x80d6cd0 <command_loop_1>, 
handlers=405575364, hfun=0x80d68c4 <cmd_error>) at eval.c:1333
#12 0x080d6ba6 in command_loop_2 () at keyboard.c:1292
#13 0x0812e63d in internal_catch (tag=405478400, func=0x80d6b88 
<command_loop_2>, arg=405478628) at eval.c:1094
#14 0x080d6b5c in command_loop () at keyboard.c:1271
#15 0x080d66a0 in recursive_edit_1 () at keyboard.c:987
#16 0x080d67b0 in Frecursive_edit () at keyboard.c:1043
#17 0x080d5111 in main (argc=1, argv=0xbffffa04) at emacs.c:1666

In GNU Emacs 21.3.50.4 (i686-pc-linux-gnu, X toolkit)
 of 2003-06-05 on coventry
configured using `configure '--prefix=/scratch2/alex/''

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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Recent input:
M-x r e p <tab> o <tab> r t <tab> <return>

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