Segmentation Fault on Cygwin

Segmentation Fault on Cygwin

[d.henman]

Re: June 12, 2008 successful build of fresh cvs emacs 2.60 source code on cygwin:


Problem:  Segmentation Fault 

This problem occurrs after the following procedures where taken.

M-x mh-rmail        # MH-E is invoked (the mail list comes up fine)
<CR>		    # Enter key hit to view a msg
..... crash!


Here is a backtrace I made:

It looks like #4 below is getting a null pointer and may be causing this, but I am not familiar with the code.

-------------------------------- start

Program received signal SIGSEGV, Segmentation fault.
0x692d065d in cygfontconfig-1!FcStringHash () from /usr/bin/cygfontconfig-1.dll
(gdb) bt
#0  0x692d065d in cygfontconfig-1!FcStringHash ()
   from /usr/bin/cygfontconfig-1.dll
#1  0x692d06c1 in cygfontconfig-1!FcPatternObjectFindElt ()
   from /usr/bin/cygfontconfig-1.dll
#2  0x692d0700 in cygfontconfig-1!FcPatternObjectGet ()
   from /usr/bin/cygfontconfig-1.dll
#3  0x692d0896 in cygfontconfig-1!FcPatternObjectGetString ()
   from /usr/bin/cygfontconfig-1.dll
#4  0x20164811 in ftfont_font_format (pattern=0x0) at ftfont.c:1740
#5  0x20164c27 in ftfont_open (f=0x203e5600, entity=579781700, pixel_size=12)
    at ftfont.c:933
#6  0x20164fb0 in ftxfont_open (f=0x203e5600, entity=579781700, pixel_size=12)
    at ftxfont.c:284
#7  0x201263e3 in font_open_entity (f=0x203e5600, entity=579781700,
    pixel_size=-1) at font.c:2566
#8  0x201293ec in font_load_for_lface (f=0x203e5600, attrs=0x22a5ac,
    spec=578917636) at font.c:2974
#9  0x2007c7c0 in realize_face (cache=0x2080f920, attrs=0x22a5ac,
    former_face_id=<value optimized out>) at xfaces.c:5801
#10 0x2007d5c5 in lookup_face (f=0x203e5600, attr=0x22a5ac) at xfaces.c:4668
#11 0x2007ed49 in face_at_buffer_position (w=0x22642400, pos=1, region_beg=-1,
    region_end=-1, endptr=0x22a658, limit=101, mouse=0) at xfaces.c:6267
#12 0x20023f5a in handle_face_prop (it=0x22a704) at xdisp.c:3360
#13 0x20024845 in handle_stop (it=0x22a704) at xdisp.c:3075
#14 0x20032c13 in start_display (it=0x22a704, w=0x22642400, pos=
      {charpos = 1, bytepos = 1}) at xdisp.c:2761
#15 0x20032e90 in try_window (window=576988164, pos=
      {charpos = 1, bytepos = 1}, check_margins=1) at xdisp.c:13843
#16 0x20039a87 in redisplay_window (window=576988164, just_this_one_p=0)
    at xdisp.c:13466
#17 0x2003b603 in redisplay_window_0 (window=576988164) at xdisp.c:12057
#18 0x20113c76 in internal_condition_case_1 (
    bfun=0x2003b5e0 <redisplay_window_0>, arg=576988164, handlers=540042765,
    hfun=0x20014e30 <redisplay_window_error>) at eval.c:1559
#19 0x20024e46 in redisplay_windows (window=-1) at xdisp.c:12036
#20 0x20024dfa in redisplay_windows (window=-1) at xdisp.c:12030
#21 0x20033a38 in redisplay_internal (preserve_echo_area=<value optimized out>)
    at xdisp.c:11602
#22 0x200b759e in read_char (commandflag=1, nmaps=2, maps=0x22c790,
    prev_event=540059649, used_mouse_menu=0x22c844, end_time=0x0)
    at keyboard.c:2685
#23 0x200ba1ab in read_key_sequence (keybuf=0x22c8f4, bufsize=30,
    prompt=540059649, dont_downcase_last=0, can_return_switch_frame=1,
    fix_current_buffer=1) at keyboard.c:9443
#24 0x200bc212 in command_loop_1 () at keyboard.c:1651
#25 0x20113ea0 in internal_condition_case (bfun=0x200bc030 <command_loop_1>,

-------------------------------- end 

regards,
  darel henman