bug#16685: Emacs crash when interacting with newsticker

[E Sabof]

I get this each time I interact with newsticker long enough. Given the amount 
of customzations I've put on this mode, I don't guarantee that it's easily 
reproducible. Find the gdb backtrace below.

Evgeni

Program received signal SIGSEGV, Segmentation fault.
0x000000000053ceba in cleanup_vector (vector=0x52cf498) at alloc.c:2909
2909          ((struct font *) vector)->driver->close ((struct font *) vector);
(gdb) backtrace
#0  0x000000000053ceba in cleanup_vector (vector=0x52cf498) at alloc.c:2909
#1  cleanup_vector (vector=0x52cf498) at alloc.c:2901
#2  0x0000000000541e5d in sweep_vectors () at alloc.c:2947
#3  gc_sweep () at alloc.c:6649
#4  Fgarbage_collect () at alloc.c:5572
#5  0x000000000058e02b in maybe_gc () at lisp.h:4518
#6  exec_byte_code (bytestr=0, vector=477, maxdepth=4611686018679046144,
    args_template=4611686018679046144, nargs=131, args=0x82) at bytecode.c:954
#7  0x0000000000559011 in funcall_lambda (fun=54085877, nargs=nargs@entry=3,
    arg_vector=arg_vector@entry=0x7fffdbe827d0) at eval.c:3047
#8  0x000000000055938b in Ffuncall (nargs=<optimized out>,
    args=0x7fffdbe827c8) at eval.c:2874
#9  0x000000000058dee3 in exec_byte_code (bytestr=0, vector=477,
    maxdepth=4611686018679046144, args_template=4611686018679046144, nargs=0,
    args=0x4) at bytecode.c:919
#10 0x0000000000559011 in funcall_lambda (fun=54085837, nargs=nargs@entry=1,
    arg_vector=arg_vector@entry=0x7fffdbe82998) at eval.c:3047
#11 0x000000000055938b in Ffuncall (nargs=nargs@entry=2,
    args=args@entry=0x7fffdbe82990) at eval.c:2874
#12 0x000000000055978a in call1 (fn=fn@entry=54085837, arg1=<optimized out>)
    at eval.c:2612
#13 0x000000000055f953 in mapcar1 (leni=leni@entry=1,
    vals=vals@entry=0x7fffdbe82a00, fn=fn@entry=54085837,
    seq=seq@entry=119453910) at fns.c:2320
#14 0x0000000000561691 in Fmapconcat (function=54085837, sequence=119453910,
    separator=8627809) at fns.c:2356
#15 0x0000000000559568 in Ffuncall (nargs=<optimized out>,
    args=<optimized out>) at eval.c:2820
#16 0x000000000058dee3 in exec_byte_code (bytestr=0, vector=477,
    maxdepth=4611686018679046144, args_template=4611686018679046144,
    nargs=131, args=0x4) at bytecode.c:919
#17 0x0000000000559011 in funcall_lambda (fun=54085877, nargs=nargs@entry=3,
    arg_vector=arg_vector@entry=0x7fffdbe82d10) at eval.c:3047
#18 0x000000000055938b in Ffuncall (nargs=<optimized out>,
    args=0x7fffdbe82d08) at eval.c:2874
#19 0x000000000058dee3 in exec_byte_code (bytestr=0, vector=477,
    maxdepth=4611686018679046144, args_template=4611686018679046144, nargs=0,
    args=0x4) at bytecode.c:919
#20 0x0000000000559011 in funcall_lambda (fun=54085837, nargs=nargs@entry=1,
    arg_vector=arg_vector@entry=0x7fffdbe82ed8) at eval.c:3047
#21 0x000000000055938b in Ffuncall (nargs=nargs@entry=2,
    args=args@entry=0x7fffdbe82ed0) at eval.c:2874
#22 0x000000000055978a in call1 (fn=fn@entry=54085837, arg1=<optimized out>)
    at eval.c:2612
#23 0x000000000055f953 in mapcar1 (leni=leni@entry=7,
    vals=vals@entry=0x7fffdbe82f40, fn=fn@entry=54085837,
    seq=seq@entry=119420310) at fns.c:2320
#24 0x0000000000561691 in Fmapconcat (function=54085837, sequence=119420310,
    separator=8627809) at fns.c:2356
#25 0x0000000000559568 in Ffuncall (nargs=<optimized out>,
    args=<optimized out>) at eval.c:2820
#26 0x000000000058dee3 in exec_byte_code (bytestr=0, vector=477,
    maxdepth=4611686018679046144, args_template=4611686018679046144,
    nargs=131, args=0x4) at bytecode.c:919
#27 0x0000000000559011 in funcall_lambda (fun=fun@entry=54085877,
    nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x7fffdbe83230)
    at eval.c:3047
#28 0x0000000000558430 in apply_lambda (fun=54085877, args=<optimized out>)
    at eval.c:2922
#29 0x00000000005587be in eval_sub (form=<optimized out>) at eval.c:2258
#30 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#31 0x000000000055bf4e in FletX (args=64541782) at eval.c:904
#32 0x0000000000558ab7 in eval_sub (form=<optimized out>) at eval.c:2131
#33 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#34 0x00000000005590d1 in funcall_lambda (fun=fun@entry=64541814,
    nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x7fffdbe83540)
    at eval.c:3040
#35 0x0000000000558430 in apply_lambda (fun=64541814, args=<optimized out>)
    at eval.c:2922
#36 0x00000000005587be in eval_sub (form=<optimized out>) at eval.c:2258
#37 0x000000000055beb2 in FletX (args=64578214) at eval.c:879
#38 0x0000000000558ab7 in eval_sub (form=<optimized out>) at eval.c:2131
#39 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#40 0x00000000005590d1 in funcall_lambda (fun=64575142, nargs=nargs@entry=1,
    arg_vector=arg_vector@entry=0x7fffdbe83948) at eval.c:3040
#41 0x000000000055938b in Ffuncall (nargs=nargs@entry=2,
    args=args@entry=0x7fffdbe83940) at eval.c:2874
#42 0x000000000055a622 in Fapply (nargs=2, args=0x7fffdbe83940) at eval.c:2299
#43 0x0000000000558ba2 in eval_sub (form=<optimized out>) at eval.c:2155
#44 0x0000000000558ab7 in eval_sub (form=<optimized out>) at eval.c:2131
#45 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#46 0x00000000005590d1 in funcall_lambda (fun=fun@entry=64456998,
    nargs=nargs@entry=2, arg_vector=arg_vector@entry=0x7fffdbe83b70)
    at eval.c:3040
#47 0x0000000000558430 in apply_lambda (fun=64456998, args=<optimized out>)
    at eval.c:2922
#48 0x00000000005587be in eval_sub (form=<optimized out>) at eval.c:2258
#49 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#50 0x00000000005590d1 in funcall_lambda (fun=fun@entry=64481302,
    nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x7fffdbe83d50)
    at eval.c:3040
#51 0x0000000000558430 in apply_lambda (fun=64481302, args=<optimized out>)
    at eval.c:2922
#52 0x00000000005587be in eval_sub (form=<optimized out>) at eval.c:2258
#53 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#54 0x0000000000558ab7 in eval_sub (form=<optimized out>) at eval.c:2131
#55 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#56 0x000000000055bd25 in Flet (args=64649446) at eval.c:974
#57 0x0000000000558ab7 in eval_sub (form=<optimized out>) at eval.c:2131
#58 0x0000000000558d85 in Fprogn (body=86832280) at eval.c:466
#59 0x00000000005590d1 in funcall_lambda (fun=fun@entry=64650134,
    nargs=nargs@entry=0, arg_vector=arg_vector@entry=0x7fffdbe84180)
    at eval.c:3040
#60 0x0000000000558430 in apply_lambda (fun=64650134, args=<optimized out>)
    at eval.c:2922
#61 0x00000000005587be in eval_sub (form=form@entry=65852774) at eval.c:2258
#62 0x000000000055ac92 in Feval (form=65852774, lexical=<optimized out>)
    at eval.c:2001
#63 0x0000000000559578 in Ffuncall (nargs=nargs@entry=2,
    args=args@entry=0x7fffdbe843c0) at eval.c:2816
#64 0x0000000000557c89 in internal_condition_case_n (
    bfun=0x559160 <Ffuncall>, nargs=nargs@entry=2,
    args=args@entry=0x7fffdbe843c0, handlers=<optimized out>,
    hfun=hfun@entry=0x439320 <safe_eval_handler>) at eval.c:1434
#65 0x00000000004364a3 in safe_call (nargs=nargs@entry=2,
    func=<optimized out>) at xdisp.c:2568
#66 0x00000000004364d2 in safe_call1 (fn=<optimized out>, arg=<optimized out>)
    at xdisp.c:2584
#67 0x000000000043675f in safe_eval (sexpr=<optimized out>) at xdisp.c:2592
#68 0x0000000000441d8c in display_mode_element (it=it@entry=0x7fffdbe84570,
    depth=1, depth@entry=0, field_width=field_width@entry=0,
    precision=precision@entry=0, elt=elt@entry=65852758, props=12103986,
    risky=risky@entry=0) at xdisp.c:21634
#69 0x00000000004468f1 in display_mode_line (w=w@entry=0x52cfa40,
    face_id=face_id@entry=HEADER_LINE_FACE_ID, format=65852758)
    at xdisp.c:21232
#70 0x0000000000446b57 in display_mode_lines (w=w@entry=0x52cfa40)
    at xdisp.c:21182
#71 0x000000000045d4d9 in redisplay_window (window=86833733,
    just_this_one_p=just_this_one_p@entry=false) at xdisp.c:16370
#72 0x0000000000460703 in redisplay_window_0 (window=window@entry=86833733)
    at xdisp.c:14051
#73 0x00000000005579ff in internal_condition_case_1 (
    bfun=bfun@entry=0x4606d0 <redisplay_window_0>, arg=86833733,
    handlers=<optimized out>,
    hfun=hfun@entry=0x42af80 <redisplay_window_error>) at eval.c:1376
#74 0x000000000042ffef in redisplay_windows (window=86833733) at xdisp.c:14031
#75 0x000000000042ffb5 in redisplay_windows (window=86552621) at xdisp.c:14025
#76 0x000000000044a981 in redisplay_internal () at xdisp.c:13630
#77 0x000000000044c7a5 in redisplay () at xdisp.c:12916
#78 0x00000000004f1171 in read_char (commandflag=1, map=map@entry=121877686,
    prev_event=12103986,
    used_mouse_menu=used_mouse_menu@entry=0x7fffdbe8c15b,
    end_time=end_time@entry=0x0) at keyboard.c:2563
#79 0x00000000004f3097 in read_key_sequence (
    keybuf=keybuf@entry=0x7fffdbe8c230, prompt=<optimized out>,
    dont_downcase_last=dont_downcase_last@entry=false,
    can_return_switch_frame=can_return_switch_frame@entry=true,
    fix_current_buffer=fix_current_buffer@entry=true,
    prevent_redisplay=prevent_redisplay@entry=false, bufsize=30)
    at keyboard.c:9071
#80 0x00000000004f4411 in command_loop_1 () at keyboard.c:1445
#81 0x00000000005578c5 in internal_condition_case (
    bfun=bfun@entry=0x4f4220 <command_loop_1>, handlers=<optimized out>,
    hfun=hfun@entry=0x4eb1e0 <cmd_error>) at eval.c:1352
#82 0x00000000004e8c1e in command_loop_2 (ignore=ignore@entry=12103986)
    at keyboard.c:1170
#83 0x00000000005577cb in internal_catch (tag=12151490,
    func=func@entry=0x4e8c00 <command_loop_2>, arg=12103986) at eval.c:1116
#84 0x00000000004eadc7 in command_loop () at keyboard.c:1149
#85 recursive_edit_1 () at keyboard.c:777
#86 0x00000000004eb0c2 in Frecursive_edit () at keyboard.c:841
#87 0x00000000004175d5 in main (argc=2, argv=<optimized out>) at emacs.c:1643

Lisp Backtrace:
"Automatic GC" (0xb71428)

"xmlgen" (0xdbe827d0)
0x33948c8 PVEC_COMPILED
"mapconcat" (0xdbe82b30)
"xmlgen" (0xdbe82d10)
0x33948c8 PVEC_COMPILED
"mapconcat" (0xdbe830d0)
"xmlgen" (0xdbe83230)
"let*" (0xdbe83428)
"smt/t-export-default-xml" (0xdbe83540)
"let*" (0xdbe83728)
"smt/t-export-default" (0xdbe83948)
"apply" (0xdbe83940)
"if" (0xdbe83a58)
"smt/maybe-funcall" (0xdbe83b70)
"smt/t-export" (0xdbe83d50)
"cond" (0xdbe83ef8)
"let" (0xdbe84068)
"smt/modeline-format" (0xdbe84180)