bug#502: 23.0.60; Occasional crash when viewing SVG files

[Markus Triska <markus.triska@gmx.at>]

After viewing several SVG files and switching between image and text
representations, Emacs crashed with the following backtrace. I cannot
yet reproduce it reliably, but it is already the second time I see it.

GNU gdb 6.3.50-20050815 (Apple version gdb-573) (Fri Oct 20 15:50:43 GMT 2006)
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "i386-apple-darwin"...Reading symbols for shared libraries .................................... done

DISPLAY = :0.0
TERM = xterm-color
Breakpoint 1 at 0x9010d3db
Breakpoint 2 at 0xee786: file sysdep.c, line 1297.
(gdb) r
Starting program: /Users/mt/emacs/src/emacs 
Reading symbols for shared libraries ....................................................................+++..+.++.+..++.+.++++++++++++.++++.....+++ done

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0253dfff
0x0016a3ad in char_quoted (charpos=1, bytepos=39051263) at syntax.c:301
301       DEC_BOTH (charpos, bytepos);
(gdb) bt
#0  0x0016a3ad in char_quoted (charpos=1, bytepos=39051263) at syntax.c:301
#1  0x001752ae in scan_lists (from=60, count=-1, depth=1, sexpflag=1) at syntax.c:2666
#2  0x00144ac4 in Ffuncall (nargs=3, args=0xbfffe2e4) at eval.c:3052
#3  0x0017dc57 in Fbyte_code (bytestr=67092811, vector=34997316, maxdepth=4) at bytecode.c:678
#4  0x00143f72 in Feval (form=40043877) at eval.c:2383
#5  0x0014655b in internal_lisp_condition_case (var=58721289, bodyform=40043877, handlers=40043757) at eval.c:1456
#6  0x0017cb8d in Fbyte_code (bytestr=67083099, vector=34997380, maxdepth=5) at bytecode.c:868
#7  0x001443a7 in funcall_lambda (fun=34997668, nargs=0, arg_vector=0xbfffe768) at eval.c:3229
#8  0x0014488a in Ffuncall (nargs=1, args=0xbfffe764) at eval.c:3099
#9  0x001460c7 in Fapply (nargs=2, args=0xbfffe764) at eval.c:2471
#10 0x00144a2f in Ffuncall (nargs=3, args=0xbfffe760) at eval.c:3023
#11 0x0017dc57 in Fbyte_code (bytestr=2391731, vector=2391756, maxdepth=4) at bytecode.c:678
#12 0x00143f72 in Feval (form=2391717) at eval.c:2383
#13 0x0014655b in internal_lisp_condition_case (var=58721289, bodyform=2391717, handlers=2391789) at eval.c:1456
#14 0x0017cb8d in Fbyte_code (bytestr=2391587, vector=2391604, maxdepth=5) at bytecode.c:868
#15 0x001443a7 in funcall_lambda (fun=2391548, nargs=1, arg_vector=0xbfffeb24) at eval.c:3229
#16 0x0014488a in Ffuncall (nargs=2, args=0xbfffeb20) at eval.c:3099
#17 0x00145c9f in call1 (fn=58751297, arg1=34997732) at eval.c:2827
#18 0x000d6ff4 in timer_check (do_it_now=1) at keyboard.c:4656
#19 0x000d71a3 in readable_events (flags=1) at keyboard.c:3646
#20 0x000ddcd7 in get_input_pending (addr=0x3220c0, flags=1) at keyboard.c:6950
#21 0x000dddf7 in detect_input_pending_run_timers (do_display=1) at keyboard.c:10620
#22 0x00187347 in wait_reading_process_output (time_limit=90, microsecs=0, read_kbd=-1, do_display=1, wait_for_cell=58721289, wait_proc=0x0, just_wait_proc=0) at process.c:4977
#23 0x0000c35a in sit_for (timeout=720, reading=1, do_display=1) at dispnew.c:6619
#24 0x000dfbcf in read_char (commandflag=1, nmaps=5, maps=0xbffff1c0, prev_event=58721289, used_mouse_menu=0xbffff2c8, end_time=0x0) at keyboard.c:2930
#25 0x000e16d2 in read_key_sequence (keybuf=0xbffff388, bufsize=30, prompt=58721289, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9429
#26 0x000e3a9c in command_loop_1 () at keyboard.c:1651
#27 0x00142c1c in internal_condition_case (bfun=0xe387e <command_loop_1>, handlers=58760929, hfun=0xdc6d9 <cmd_error>) at eval.c:1511
#28 0x000d5830 in command_loop_2 () at keyboard.c:1367
#29 0x0014286e in internal_catch (tag=58757001, func=0xd57ec <command_loop_2>, arg=58721289) at eval.c:1247
#30 0x000d55d2 in command_loop () at keyboard.c:1346
#31 0x000d568b in recursive_edit_1 () at keyboard.c:955
#32 0x000d57d3 in Frecursive_edit () at keyboard.c:1017
#33 0x000d4813 in main (argc=1, argv=0xbffff7b8) at emacs.c:1762

Lisp Backtrace:
"scan-sexps" (0xbfffe2e8)
"byte-code" (0xbfffe3d4)
"show-paren-function" (0xbfffe768)
"apply" (0xbfffe764)
"byte-code" (0xbfffe854)
"timer-event-handler" (0xbfffeb24)
(gdb) bt full
#0  0x0016a3ad in char_quoted (charpos=1, bytepos=39051263) at syntax.c:301
        p = (unsigned char *) 0x253dfff <Address 0x253dfff out of bounds>
        beg = 1
        quoted = 0
#1  0x001752ae in scan_lists (from=60, count=-1, depth=1, sexpflag=1) at syntax.c:2666
        val = 39051264
        stop = 1
        c = 60
        c1 = 3307680
        stringterm = 34
        quoted = 0
        mathexit = 0
        code = Sclose
        temp_code = 39051264
        min_depth = 0
        comstyle = 0
        comnested = 0
        temp_pos = 60
        last_good = 38
        found = 39051264
        from_byte = 1
        out_bytepos = 1536514
        out_charpos = 87
        dummy = 87
        multibyte_symbol_p = 0
#2  0x00144ac4 in Ffuncall (nargs=3, args=0xbfffe2e4) at eval.c:3052
        fun = -1073749272
        original_fun = 3068784
        funcar = 39051263
        numargs = 2
        val = 49090256
        backtrace = {
  next = 0xbfffe3f4, 
  function = 0xbfffe2e4, 
  args = 0xbfffe2e8, 
  nargs = 2, 
  evalargs = 0 '\0', 
  debug_on_exit = 0 '\0'
}
        internal_args = (Lisp_Object *) 0xbfffe2e8
        i = 39051263
        args = (Lisp_Object *) 0x2ed370
#3  0x0017dc57 in Fbyte_code (bytestr=67092811, vector=34997316, maxdepth=4) at bytecode.c:678
        op = 39051264
        vectorp = (Lisp_Object *) 0x2160448
        stack = {
  pc = 0x591a186 "=\207", 
  top = 0xbfffe2ec, 
  bottom = 0xbfffe2e0, 
  byte_string = 67092811, 
  byte_string_start = 0x591a180 "`\302\b\t[\"=\207", 
  constants = 34997316, 
  next = 0xbfffe584
}
        result = 49090256
        bytestr = 39051263
#4  0x00143f72 in Feval (form=40043877) at eval.c:2383
        numargs = 39051263
        argvals = {67092811, 34997316, 32, 2387403, 37, 58721289, 1323343, 339607552}
        args_left = 58721289
        i = 3
        fun = 49090256
        val = 49090256
        original_fun = 58832137
        original_args = 40043869
        funcar = 39051263
        backtrace = {
  next = 0xbfffe64c, 
  function = 0xbfffe40c, 
  args = 0xbfffe3d4, 
  nargs = 3, 
  evalargs = 1 '\001', 
  debug_on_exit = 0 '\0'
}
        form = 58721289
#5  0x0014655b in internal_lisp_condition_case (var=58721289, bodyform=40043877, handlers=40043757) at eval.c:1456
        val = 39051263
        c = {
  tag = 58721289, 
  val = 58721289, 
  next = 0xbfffe8c8, 
  gcpro = 0x0, 
  jmp = {895, 49090256, 8096, 1336252, -1073748872, 1273953, 93429718, 58721289, -1073748760, -1073748944, 458783, 662, 1336418, 1245207, 31, 31, 3014656, 1245239}, 
  backlist = 0xbfffe64c, 
  handlerlist = 0xbfffe93c, 
  lisp_eval_depth = 4, 
  pdlcount = 15, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0xbfffe584
}
        h = {
  handler = 40043757, 
  var = 58721289, 
  chosen_clause = 93429702, 
  tag = 0xbfffe448, 
  next = 0xbfffe93c
}
#6  0x0017cb8d in Fbyte_code (bytestr=67083099, vector=34997380, maxdepth=5) at bytecode.c:868
        handlers = 39051264
        body = 39051263
        op = 39051264
        vectorp = (Lisp_Object *) 0x2160488
        stack = {
  pc = 0x5919fd6 "\204S", 
  top = 0xbfffe500, 
  bottom = 0xbfffe500, 
  byte_string = 67083099, 
  byte_string_start = 0x5919f88 "\b\203\265\001`\306\307`S!!\310=\203\024", 
  constants = 34997380, 
  next = 0xbfffe7d4
}
        result = 49090256
        bytestr = 39051263
#7  0x001443a7 in funcall_lambda (fun=34997668, nargs=0, arg_vector=0xbfffe768) at eval.c:3229
        val = 39051264
        syms_left = 34997664
        next = 34997664
        i = 0
        optional = -1073748392
        rest = 1254869
#8  0x0014488a in Ffuncall (nargs=1, args=0xbfffe764) at eval.c:3099
        fun = 34997668
        original_fun = 93610545
        funcar = 39051263
        numargs = 0
        val = 49090256
        backtrace = {
  next = 0xbfffe71c, 
  function = 0xbfffe764, 
  args = 0xbfffe768, 
  nargs = 0, 
  evalargs = 0 '\0', 
  debug_on_exit = 0 '\0'
}
        internal_args = (Lisp_Object *) 0x21605a4
        i = 39051263
        args = (Lisp_Object *) 0x5946231
#9  0x001460c7 in Fapply (nargs=2, args=0xbfffe764) at eval.c:2471
        i = 2683843
        numargs = 39051264
        spread_arg = 58721289
        funcall_args = (Lisp_Object *) 0x0
        fun = 93610545
#10 0x00144a2f in Ffuncall (nargs=3, args=0xbfffe760) at eval.c:3023
        fun = 3063172
        original_fun = -1073748124
        funcar = 39051263
        numargs = 2
        val = 49090256
        backtrace = {
  next = 0xbfffe874, 
  function = 0xbfffe760, 
  args = 0xbfffe764, 
  nargs = 2, 
  evalargs = 0 '\0', 
  debug_on_exit = 0 '\0'
}
        internal_args = (Lisp_Object *) 0x2ebd84
        i = 39051263
        args = (Lisp_Object *) 0xbfffe764
#11 0x0017dc57 in Fbyte_code (bytestr=2391731, vector=2391756, maxdepth=4) at bytecode.c:678
        op = 39051264
        vectorp = (Lisp_Object *) 0x247ed0
        stack = {
  pc = 0x28f126 "\207", 
  top = 0xbfffe768, 
  bottom = 0xbfffe760, 
  byte_string = 2391731, 
  byte_string_start = 0x28f11e "\301\b\302H\b\303H\"\207", 
  constants = 2391756, 
  next = 0xbfffea04
}
        result = 49090256
        bytestr = 39051263
#12 0x00143f72 in Feval (form=2391717) at eval.c:2383
        numargs = 39051263
        argvals = {2391731, 2391756, 32, 34752944, 31, 0, 1323343, 0}
        args_left = 58721289
        i = 3
        fun = 49090256
        val = 49090256
        original_fun = 58832137
        original_args = 2391725
        funcar = 39051263
        backtrace = {
  next = 0xbfffeacc, 
  function = 0xbfffe88c, 
  args = 0xbfffe854, 
  nargs = 3, 
  evalargs = 1 '\001', 
  debug_on_exit = 0 '\0'
}
        form = 58721289
#13 0x0014655b in internal_lisp_condition_case (var=58721289, bodyform=2391717, handlers=2391789) at eval.c:1456
        val = 39051263
        c = {
  tag = 58721289, 
  val = 58721289, 
  next = 0xbffff438, 
  gcpro = 0x0, 
  jmp = {895, 0, 8096, 1336252, -1073747672, 1328852, 2683286, 58721289, -1073747608, -1073747792, 34734111, 658, 1336418, 1245207, -1877934049, -1073807329, 0, 1310775}, 
  backlist = 0xbfffeacc, 
  handlerlist = 0xbffff4ac, 
  lisp_eval_depth = 1, 
  pdlcount = 8, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0xbfffea04
}
        h = {
  handler = 2391789, 
  var = 58721289, 
  chosen_clause = -1073747580, 
  tag = 0xbfffe8c8, 
  next = 0xbffff4ac
}
#14 0x0017cb8d in Fbyte_code (bytestr=2391587, vector=2391604, maxdepth=5) at bytecode.c:868
        handlers = 39051264
        body = 39051263
        op = 39051264
        vectorp = (Lisp_Object *) 0x247e38
        stack = {
  pc = 0x28f196 "\210\016\026\205x", 
  top = 0xbfffe980, 
  bottom = 0xbfffe980, 
  byte_string = 2391587, 
  byte_string_start = 0x28f128 "\b\021\n\020\v\022\306\034\307\v!\203|", 
  constants = 2391604, 
  next = 0x0
}
        result = 49090256
        bytestr = 39051263
#15 0x001443a7 in funcall_lambda (fun=2391548, nargs=1, arg_vector=0xbfffeb24) at eval.c:3229
        val = 39051264
        syms_left = 2391544
        next = 2391544
        i = 1
        optional = 0
        rest = 0
#16 0x0014488a in Ffuncall (nargs=2, args=0xbfffeb20) at eval.c:3099
        fun = 2391548
        original_fun = 58751297
        funcar = 39051263
        numargs = 1
        val = 49090256
        backtrace = {
  next = 0x0, 
  function = 0xbfffeb20, 
  args = 0xbfffeb24, 
  nargs = 1, 
  evalargs = 0 '\0', 
  debug_on_exit = 0 '\0'
}
        internal_args = (Lisp_Object *) 0x247dfc
        i = 39051263
        args = (Lisp_Object *) 0x3807941
#17 0x00145c9f in call1 (fn=58751297, arg1=34997732) at eval.c:2827
        ret_ungc_val = 39051264
#18 0x000d6ff4 in timer_check (do_it_now=1) at keyboard.c:4656
        old_deactivate_mark = 58721289
        vector = (Lisp_Object *) 0x21605e8
        timer = 49090256
        idle_timer = 3
        now = {
  tv_sec = 1214737498, 
  tv_usec = 44691
}
        timers = 58721289
        idle_timers = 40292237
        chosen_timer = 34997732
#19 0x000d71a3 in readable_events (flags=1) at keyboard.c:3646
        event = (struct input_event *) 0x253dfff
#20 0x000ddcd7 in get_input_pending (addr=0x3220c0, flags=1) at keyboard.c:6950
No locals.
#21 0x000dddf7 in detect_input_pending_run_timers (do_display=1) at keyboard.c:10620
        old_timers_run = 645
#22 0x00187347 in wait_reading_process_output (time_limit=90, microsecs=0, read_kbd=-1, do_display=1, wait_for_cell=58721289, wait_proc=0x0, just_wait_proc=0) at process.c:4977
        old_timers_run = 645
        old_buffer = (struct buffer *) 0x2ed0ed0
        old_window = 34896372
        leave = 1
        timeout_reduced_for_timers = 1
        channel = 31
        nfds = 0
        Available = {
  fds_bits = {0 <repeats 32 times>}
}
        Connecting = {
  fds_bits = {0 <repeats 32 times>}
}
        check_connect = 0
        check_delay = 0
        no_avail = 0
        xerrno = 65535
        proc = 1
        timeout = {
  tv_sec = 0, 
  tv_usec = 21768
}
        end_time = {
  tv_sec = 1214737587, 
  tv_usec = 924519
}
        wait_channel = -1
        got_some_input = 0
#23 0x0000c35a in sit_for (timeout=720, reading=1, do_display=1) at dispnew.c:6619
        sec = 90
        usec = 0
        do_display = 1
#24 0x000dfbcf in read_char (commandflag=1, nmaps=5, maps=0xbffff1c0, prev_event=58721289, used_mouse_menu=0xbffff2c8, end_time=0x0) at keyboard.c:2930
        tem0 = 30
        delay_level = 12
        buffer_size = 39051263
        c = 58721289
        count = 58721289
        jmpcount = 2
        local_getcjmp = {-1073806465, 1329290, 8096, 912217, -1073745608, 1246001, 3289872, 3284528, -1073745560, -1073746032, 3276831, 662, 914156, 1245207, 58982431, 58720287, 58720256, 55}
        save_jump = {0 <repeats 18 times>}
        key_already_recorded = 0
        tem = 39051264
        save = -1073745824
        previous_echo_area_message = 58721289
        also_record = 58721289
        reread = 0
        polling_stopped_here = 30
        orig_kboard = (struct kboard *) 0x2132f20
#25 0x000e16d2 in read_key_sequence (keybuf=0xbffff388, bufsize=30, prompt=58721289, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9429
        interrupted_kboard = (KBOARD *) 0x2132f20
        used_mouse_menu = 0
        echo_local_start = 0
        last_real_key_start = 0
        keys_local_start = 0
        local_first_binding = 0
        from_string = 58721289
        count = 2
        t = 0
        echo_start = 0
        keys_start = 0
        nmaps = 5
        nmaps_allocated = 5
        defs = (Lisp_Object * volatile) 0xbffff190
        submaps = (Lisp_Object * volatile) 0xbffff1c0
        orig_local_map = 40292269
        orig_keymap = 58721289
        localized_local_map = 0
        first_binding = 0
        first_unbound = 31
        mock_input = 0
        fkey = {
  parent = 40036973, 
  map = 40036973, 
  start = 0, 
  end = 0
}
        keytran = {
  parent = 33947517, 
  map = 33947517, 
  start = 0, 
  end = 0
}
        indec = {
  parent = 40036981, 
  map = 40036981, 
  start = 0, 
  end = 0
}
        shift_translated = 0
        delayed_switch_frame = 58721289
        original_uppercase = -1073745128
        original_uppercase_position = -1
        starting_buffer = (struct buffer *) 0x2ed0ed0
        fake_prefixed_keys = 58721289
#26 0x000e3a9c in command_loop_1 () at keyboard.c:1651
        cmd = 3284528
        lose = 3284528
        nonundocount = 0
        keybuf = {192, 48, 56, 58721289, -1073744872, 903096, 38425293, -1073744946, -1073744904, -1879037169, 92274892, 152, -1073744946, 58721289, 100663439, 1, 43, -1879036413, 51396120, 58721337, 51385976, -1881082098, 5625428, 0, -1073744900, -1073745088, 0, 3342336, 58721289, 67060025}
        i = 2
        prev_modiff = 428
        prev_buffer = (struct buffer *) 0x67171e0
        already_adjusted = 0
#27 0x00142c1c in internal_condition_case (bfun=0xe387e <command_loop_1>, handlers=58760929, hfun=0xdc6d9 <cmd_error>) at eval.c:1511
        val = 39051263
        c = {
  tag = 58721289, 
  val = 58721289, 
  next = 0xbffff53c, 
  gcpro = 0x0, 
  jmp = {895, 17831856, 8096, 1321771, 58721289, 58721289, 3297712, 3284528, -1073744680, -1073744864, 31, 658, 1321920, 1507351, 3276831, 3276831, -1073807360, -1073807305}, 
  backlist = 0x0, 
  handlerlist = 0x0, 
  lisp_eval_depth = 0, 
  pdlcount = 2, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0x0
}
        h = {
  handler = 58760929, 
  var = 58721289, 
  chosen_clause = 58721337, 
  tag = 0xbffff438, 
  next = 0x0
}
#28 0x000d5830 in command_loop_2 () at keyboard.c:1367
        val = 39051264
#29 0x0014286e in internal_catch (tag=58757001, func=0xd57ec <command_loop_2>, arg=58721289) at eval.c:1247
        c = {
  tag = 58757001, 
  val = 58721289, 
  next = 0x0, 
  gcpro = 0x0, 
  jmp = {895, 18, 8096, 1320914, 0, 20367, 3306688, 3284528, -1073744456, -1073744608, 58851359, 658, 1321057, 58851351, 58851359, 58720287, 51380224, 55}, 
  backlist = 0x0, 
  handlerlist = 0x0, 
  lisp_eval_depth = 0, 
  pdlcount = 2, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0x0
}
        tag = 39051264
#30 0x000d55d2 in command_loop () at keyboard.c:1346
        val = 39051264
#31 0x000d568b in recursive_edit_1 () at keyboard.c:955
        val = 0
#32 0x000d57d3 in Frecursive_edit () at keyboard.c:1017
        buffer = 58721289
#33 0x000d4813 in main (argc=1, argv=0xbffff7b8) at emacs.c:1762
        dummy = -1881117246
        stack_bottom_variable = 0 '\0'
        do_initial_setlocale = 1
        skip_args = 0
        rlim = {
  rlim_cur = 8388608, 
  rlim_max = 67108864
}
        no_loadup = 0
        junk = 0x0

Lisp Backtrace:
"scan-sexps" (0xbfffe2e8)
"byte-code" (0xbfffe3d4)
"show-paren-function" (0xbfffe768)
"apply" (0xbfffe764)
"byte-code" (0xbfffe854)
"timer-event-handler" (0xbfffeb24)


In GNU Emacs 23.0.60.1 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2008-06-29 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
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: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t