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bug#8334: Segmentation fault in mark_object (in my patched version)


From: Lennart Borgman
Subject: bug#8334: Segmentation fault in mark_object (in my patched version)
Date: Thu, 24 Mar 2011 01:07:19 +0100

I just got a segmentation fault in mark_object. This was with my
patched version:

  This Emacs was built from sources in bazaar identified as:

  Nick 'trunk' info:
  revision id: address@hidden
        revno: 103306
         date: 2011-02-16 23:12:47 +0000

  Nick 'emacsw32' (from 'trunk') info:
  revision id: address@hidden
        revno: 99348
         date: 2011-02-17 00:37:41 +0100

Program received signal SIGSEGV, Segmentation fault.
0x01028778 in mark_object (arg=6637606) at alloc.c:5531
warning: Source file is more recent than executable.
5531            if (EQ (ptr->u.cdr, Qnil))
(gdb) bt
#0  0x01028778 in mark_object (arg=6637606) at alloc.c:5531
#1  0x0102880d in mark_object (arg=301623766) at alloc.c:5542
#2  0x0102853e in mark_object (arg=297533442) at alloc.c:5435
#3  0x0102678d in mark_maybe_pointer (p=0x11bc0000) at alloc.c:4089
#4  0x01026520 in mark_memory (start=0x82cae8, end=0x82ff30, offset=0)
    at alloc.c:4139
#5  0x01026da2 in mark_stack () at alloc.c:4385
#6  0x01027a3c in Fgarbage_collect () at alloc.c:4967
#7  0x01020968 in Feval (form=301887150) at eval.c:2143
#8  0x01021081 in Feval (form=270381486) at eval.c:2312
#9  0x0101dcc9 in Fprogn (args=270381710) at eval.c:343
#10 0x01020aff in Feval (form=270381478) at eval.c:2198
#11 0x0101dbf6 in Fif (args=270381470) at eval.c:293
#12 0x01020aff in Feval (form=270381446) at eval.c:2198
#13 0x0101dcc9 in Fprogn (args=301886974) at eval.c:343
#14 0x01020aff in Feval (form=301886998) at eval.c:2198
#15 0x0101dbf6 in Fif (args=301887014) at eval.c:293
#16 0x01020aff in Feval (form=301887022) at eval.c:2198
#17 0x01021081 in Feval (form=270381126) at eval.c:2312
#18 0x0101dcc9 in Fprogn (args=270458606) at eval.c:343
#19 0x0101eeb2 in Flet (args=270381118) at eval.c:1000
#20 0x01020aff in Feval (form=270383022) at eval.c:2198
#21 0x0101dcc9 in Fprogn (args=301889606) at eval.c:343
#22 0x010224d9 in funcall_lambda (fun=301889630, nargs=1, arg_vector=0x82d78c)
    at eval.c:3021
#23 0x01022004 in Ffuncall (nargs=2, args=0x82d788) at eval.c:2902
#24 0x0102186a in call1 (fn=301889630, arg1=49847742) at eval.c:2643
#25 0x0103ad9f in mapcar1 (leni=30, vals=0x0, fn=301889630, seq=301774390)
    at fns.c:2344
#26 0x0103b145 in Fmapc (function=301889630, sequence=301774390) at fns.c:2433
#27 0x01020dc4 in Feval (form=270382958) at eval.c:2254
#28 0x0101dcc9 in Fprogn (args=301772870) at eval.c:343
#29 0x0101ef8c in Fwhile (args=301772886) at eval.c:1022
#30 0x01020aff in Feval (form=301772894) at eval.c:2198
#31 0x0101dcc9 in Fprogn (args=301772902) at eval.c:343
#32 0x0101eeb2 in Flet (args=301772910) at eval.c:1000
#33 0x01020aff in Feval (form=301772918) at eval.c:2198
#34 0x0101dcc9 in Fprogn (args=301772950) at eval.c:343
#35 0x0101f22a in internal_catch (tag=271267586, func=0x101dca0 <Fprogn>,
    arg=301772950) at eval.c:1152
#36 0x0101f195 in Fcatch (args=301772982) at eval.c:1123
#37 0x01020aff in Feval (form=301772990) at eval.c:2198
#38 0x01020d17 in Feval (form=301773006) at eval.c:2236
#39 0x01021081 in Feval (form=301772942) at eval.c:2312
#40 0x01021081 in Feval (form=270382894) at eval.c:2312
#41 0x0101dcc9 in Fprogn (args=301774582) at eval.c:343
#42 0x0101ef8c in Fwhile (args=301774598) at eval.c:1022
#43 0x01020aff in Feval (form=301774606) at eval.c:2198
#44 0x0101dcc9 in Fprogn (args=301774614) at eval.c:343
#45 0x0101eeb2 in Flet (args=301774622) at eval.c:1000
#46 0x01020aff in Feval (form=301774630) at eval.c:2198
#47 0x0101dcc9 in Fprogn (args=301774662) at eval.c:343
#48 0x0101f22a in internal_catch (tag=271267586, func=0x101dca0 <Fprogn>,
    arg=301774662) at eval.c:1152
#49 0x0101f195 in Fcatch (args=301774694) at eval.c:1123
#50 0x01020aff in Feval (form=301774702) at eval.c:2198
#51 0x01020d17 in Feval (form=301774718) at eval.c:2236
#52 0x01021081 in Feval (form=301774654) at eval.c:2312
#53 0x01021081 in Feval (form=270382822) at eval.c:2312
#54 0x0101dcc9 in Fprogn (args=270458654) at eval.c:343
#55 0x0101eeb2 in Flet (args=270382758) at eval.c:1000
#56 0x01020aff in Feval (form=270382574) at eval.c:2198
#57 0x0101dcc9 in Fprogn (args=270458662) at eval.c:343
#58 0x01020aff in Feval (form=270382566) at eval.c:2198
#59 0x0101dcc9 in Fprogn (args=270458670) at eval.c:343
#60 0x010224d9 in funcall_lambda (fun=270458678, nargs=1, arg_vector=0x82ef10)
    at eval.c:3021
#61 0x010221ef in apply_lambda (fun=270458678, args=270458854, eval_flag=1)
    at eval.c:2954
#62 0x010210ab in Feval (form=270458838) at eval.c:2314
#63 0x0101dcc9 in Fprogn (args=270458846) at eval.c:343
#64 0x0101dc16 in Fif (args=270458766) at eval.c:294
#65 0x01020aff in Feval (form=270458758) at eval.c:2198
#66 0x0101dcc9 in Fprogn (args=270456958) at eval.c:343
#67 0x010224d9 in funcall_lambda (fun=270456966, nargs=1, arg_vector=0x82f2e0)
    at eval.c:3021
#68 0x010221ef in apply_lambda (fun=270456966, args=270457342, eval_flag=1)
    at eval.c:2954
#69 0x010210ab in Feval (form=270457334) at eval.c:2314
#70 0x0101dcc9 in Fprogn (args=270457350) at eval.c:343
#71 0x0101eeb2 in Flet (args=270457262) at eval.c:1000
#72 0x01020aff in Feval (form=270457190) at eval.c:2198
#73 0x0101f62f in internal_lisp_condition_case (var=49818274,
    bodyform=270457190, handlers=270457422) at eval.c:1355
#74 0x0101f451 in Fcondition_case (args=270457182) at eval.c:1297
#75 0x01020aff in Feval (form=270457174) at eval.c:2198
#76 0x0101dcc9 in Fprogn (args=270457430) at eval.c:343
#77 0x010224d9 in funcall_lambda (fun=270457438, nargs=0, arg_vector=0x82fa18)
    at eval.c:3021
#78 0x01022004 in Ffuncall (nargs=1, args=0x82fa14) at eval.c:2902
#79 0x01021738 in run_hook_with_args (nargs=1, args=0x82fa14,
    cond=to_completion) at eval.c:2573
#80 0x010214fb in Frun_hooks (nargs=1, args=0x82facc) at eval.c:2443
#81 0x01021c62 in Ffuncall (nargs=2, args=0x82fac8) at eval.c:2824
#82 0x0102186a in call1 (fn=49400410, arg1=49289770) at eval.c:2643
#83 0x01005c76 in safe_run_hooks_1 () at keyboard.c:1822
#84 0x0101f739 in internal_condition_case (bfun=0x1005c43 <safe_run_hooks_1>,
    handlers=49244210, hfun=0x1005c7e <safe_run_hooks_error>) at eval.c:1408
#85 0x01005d16 in safe_run_hooks (hook=49289770) at keyboard.c:1848
#86 0x01004ff2 in command_loop_1 () at keyboard.c:1545
#87 0x0101f739 in internal_condition_case (bfun=0x10048d9 <command_loop_1>,
    handlers=49297818, hfun=0x10042ce <cmd_error>) at eval.c:1408
#88 0x0100463e in command_loop_2 (ignore=49244186) at keyboard.c:1129
#89 0x0101f22a in internal_catch (tag=49295914,
    func=0x100461b <command_loop_2>, arg=49244186) at eval.c:1152
#90 0x010045f6 in command_loop () at keyboard.c:1108
#91 0x01003eea in recursive_edit_1 () at keyboard.c:731
#92 0x0100404e in Frecursive_edit () at keyboard.c:793
#93 0x01002767 in main (argc=1, argv=0xb23d08) at emacs.c:1684

Lisp Backtrace:
"when" (0x82ce00)
"progn" (0x82cf50)
"if" (0x82d0a0)
"progn" (0x82d1f0)
"if" (0x82d340)
"when" (0x82d450)
"let" (0x82d640)
0x11fe7858 Lisp type 6
"mapc" (0x82d8c0)
"while" (0x82db00)
"let" (0x82dcf0)
"catch" (0x82df00)
"cl-block-wrapper" (0x82e010)
"block" (0x82e120)
"dolist" (0x82e230)
"while" (0x82e3e0)
"let" (0x82e5d0)
"catch" (0x82e7e0)
"cl-block-wrapper" (0x82e8f0)
"block" (0x82ea00)
"dolist" (0x82eb10)
"let" (0x82ed10)
"progn" (0x82ee60)
"menuacc-add-accel-1" (0x82ef10)
"if" (0x82f230)
"menuacc-add-accel" (0x82f2e0)
"let" (0x82f660)
"condition-case" (0x82f860)
"menuacc-add-accel-from-post-command-hook" (0x82fa18)
"run-hooks" (0x82facc)
(gdb)





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