Re: crash when function-key-map is nil

[Johan Bockgård]

Richard Stallman <address@hidden> writes:

>     emacs -Q
>
>     (setq function-key-map)
>
> (Do you evaluate that?)

Yes. Sorry.

>     Press a key  =>  Segfault.
>
> It does not fail for me.


Program received signal SIGSEGV, Segmentation fault.
0x0000000000526211 in Fget (symbol=0, propname=9476017) at fns.c:2004
(gdb) bt full
#0  0x0000000000526211 in Fget (symbol=0, propname=9476017) at fns.c:2004
No locals.
#1  0x00000000004b74d0 in parse_modifiers (symbol=1) at keyboard.c:6147
        elements = 4294967296
#2  0x00000000004b77c0 in reorder_modifiers (symbol=1) at keyboard.c:6266
        parsed = 9700501
#3  0x00000000004c368a in access_keymap (map=11100261, idx=1, t_ok=1, 
noinherit=0, autoload=1) at keymap.c:527
        val = 9411009
#4  0x00000000004bbcee in access_keymap_keyremap (map=11100261, key=1, 
prompt=9410961, do_funcall=1) at keyboard.c:8374
        next = 9410961
#5  0x00000000004bbf7f in keyremap_step (keybuf=0x7fffff818780, bufsize=30, 
fkey=0x7fffff8184c0, input=1, doit=1, diff=0x7fffff81839c, prompt=9410961) at 
keyboard.c:8429
        next = 9410961
        key = 1
#6  0x00000000004be35a in read_key_sequence (keybuf=0x7fffff818780, bufsize=30, 
prompt=9410961, dont_downcase_last=0, can_return_switch_frame=1, 
fix_current_buffer=1) at keyboard.c:9386
        gcpro1 = {
  next = 0x0, 
  var = 0x0, 
  nvars = 0
}
        gcpro3 = {
  next = 0x0, 
  var = 0x0, 
  nvars = 0
}
        done = 0
        gcpro2 = {
  next = 0x0, 
  var = 0x0, 
  nvars = 0
}
        diff = 0
        key = 9686017
        used_mouse_menu = 0
        echo_local_start = 0
        last_real_key_start = 0
        keys_local_start = 0
        local_first_binding = 0
        from_string = 9410961
        count = 2
        t = 1
        echo_start = 0
        keys_start = 0
        nmaps = 2
        nmaps_allocated = 2
        defs = (Lisp_Object * volatile) 0x7fffff818220
        submaps = (Lisp_Object * volatile) 0x7fffff818240
        orig_local_map = 12633525
        orig_keymap = 9410961
        localized_local_map = 0
        first_binding = 1
        first_unbound = 31
        mock_input = 0
        fkey = {
  map = 9410961, 
  parent = 9410961, 
  start = 31, 
  end = 31
}
        keytran = {
  map = 11100261, 
  parent = 11100261, 
  start = 17, 
  end = 18
}
        delayed_switch_frame = 9410961
        original_uppercase = 0
        original_uppercase_position = -1
        dummyflag = 0
        starting_buffer = (struct buffer *) 0x906600
        fake_prefixed_keys = 9410961
        gcpro1 = {
  next = 0x0, 
  var = 0x0, 
  nvars = 0
}
#7  0x00000000004ae0da in command_loop_1 () at keyboard.c:1535
        cmd = 10223825
        lose = 0
        nonundocount = 0
        keybuf = {9686017, 40, 140737480067088, 0, 140737480069288, 0, 
140737480067008, 5367980, 140737480067088, 5367886, 4294967296, 8115972, 
14849504, 8115968, 0, 140737480069288, 140737480069016, 1, 140737480067296, 
5365576, 46912518591648, 678102311572810528, 2, 678102312996145280, 0, 
14849504, 46912521232444, 46912521212752, 46912521165136, 22}
        i = 2
        no_direct = 0
        prev_modiff = 4
        prev_buffer = (struct buffer *) 0x906600
        was_locked = 0
        already_adjusted = 0
#8  0x000000000051cd76 in internal_condition_case (bfun=0x4add64 
<command_loop_1>, handlers=9494817, hfun=0x4ad7a0 <cmd_error>) at eval.c:1469
        val = <value optimized out>
        c = {
  tag = 9410961, 
  val = 9410961, 
  next = 0x7fffff818a90, 
  gcpro = 0x0, 
  jmp = {{
      __jmpbuf = {0, 140737480067696, 0, 140737480069288, 140737480069016, 1, 
140737480067328, 5360889}, 
      __mask_was_saved = 0, 
      __saved_mask = {
        __val = {14119920, 14, 14, 140737480069288, 14848404, 46912521207496, 
46912518592824, 2888375576, 6981624, 0, 140737480069288, 140737480069016, 1, 
140737480068048, 46912496164043, 1}
      }
    }}, 
  backlist = 0x0, 
  handlerlist = 0x0, 
  lisp_eval_depth = 0, 
  pdlcount = 2, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0x0
}
        h = {
  handler = 9494817, 
  var = 9410961, 
  chosen_clause = 9410961, 
  tag = 0x7fffff818920, 
  next = 0x0
}
#9  0x00000000004adbc3 in command_loop_2 () at keyboard.c:1326
        val = 1

#10 0x000000000051c967 in internal_catch (tag=<value optimized out>, 
func=0x4adba9 <command_loop_2>, arg=9410961) at eval.c:1210
        c = {
  tag = 9482849, 
  val = 9410961, 
  next = 0x0, 
  gcpro = 0x0, 
  jmp = {{
      __jmpbuf = {0, 140737480068048, 0, 140737480069288, 140737480069016, 1, 
140737480067712, 5359963}, 
      __mask_was_saved = 0, 
      __saved_mask = {
        __val = {0, 2888375576, 14119888, 18, 18, 140737480069288, 
140737480067858, 1, 0, 46912499937712, 9747050, 9747048, 9753856, 9463296, 
9753857, 9410961}
      }
    }}, 
  backlist = 0x0, 
  handlerlist = 0x0, 
  lisp_eval_depth = 0, 
  pdlcount = 2, 
  poll_suppress_count = 1, 
  interrupt_input_blocked = 0, 
  byte_stack = 0x0
}
#11 0x00000000004adb7d in command_loop () at keyboard.c:1305
No locals.
#12 0x00000000004ad4b5 in recursive_edit_1 () at keyboard.c:1003
        count = 1
        val = 0
#13 0x00000000004ad613 in Frecursive_edit () at keyboard.c:1064
        count = 0
        buffer = 9410961
#14 0x00000000004ac01f in main (argc=2, argv=0x7fffff8190a8) at emacs.c:1794
        tz = 0x0
        dummy = 0
        stack_bottom_variable = 0 '\0'
        do_initial_setlocale = <value optimized out>
        skip_args = 0
        rlim = {
  rlim_cur = 8720000, 
  rlim_max = 18446744073709551615
}
        no_loadup = 0
        junk = 0x0


-- 
Johan Bockgård