Package: emacs;
Reported by: Tassilo Horn <tsdh <at> gnu.org>
Date: Fri, 21 Aug 2015 16:28:01 UTC
Severity: normal
Found in version 25.0.50
Done: Tassilo Horn <tsdh <at> gnu.org>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Tassilo Horn <tsdh <at> gnu.org> To: 21313 <at> debbugs.gnu.org Subject: bug#21313: 25.0.50; Strange errors from dbus-handle-event Date: Wed, 09 Sep 2015 22:43:28 +0200
This problem has nothing to to with dbus in particular. Today I had a
different occurrence of the bug where during repeated killing in a
message-mode buffer I suddenly got an error about something with a
file-notify event. I've stopped killing then just to read the error
message, and then I restarted killing which out of sudden made emacs
crash.
Since then I've let emacs run in the debugger. Just right now I had
another crash during repeated killing in message-mode, and below is the
backtrace.
To me that backtrace looks like there's a bug in the error printing code
which seems to cause the crashes. But it does not explain the source of
the errors I sometimes get during pressing and holding C-k in
message-mode. Those errors always sound as if events of the wrong kind
have been delegated to some event handlers, e.g., `dbus-handle-event'
might have received some file-notify event or `file-notify-handle-event'
might have received some keyboard event.
Any ideas how to debug that? The problem is that it is not really
reproducible, it just happens once every second day or so.
--8<---------------cut here---------------start------------->8---
Program received signal SIGSEGV, Segmentation fault.
0x000000000054ab2f in SYMBOL_INTERNED_P (sym=185795904) at lisp.h:1770
1770 return XSYMBOL (sym)->interned != SYMBOL_UNINTERNED;
(gdb) bt full
#0 0x000000000054ab2f in SYMBOL_INTERNED_P (sym=185795904) at lisp.h:1770
No locals.
#1 0x0000000000610588 in print_preprocess (obj=185795904) at print.c:1179
i = 0
size = 0
loop_count = 0
halftail = 185795904
#2 0x0000000000610328 in print (obj=185795904, printcharfun=43968, escapeflag=true)
at print.c:1116
No locals.
#3 0x000000000060df75 in Fprin1 (object=185795904, printcharfun=43968) at print.c:626
old = 0xaecc460
old_point = -1
start_point = -1
old_point_byte = -1
start_point_byte = -1
specpdl_count = 3
free_print_buffer = false
multibyte = true
original = 43968
#4 0x000000000060fead in print_error_message (data=86346515, stream=43968,
context=0xbe1a9f <pure+2999999> "", caller=23712) at print.c:946
obj = 185795904
sep = 0x6b806f ", "
errname = 50304
errmsg = 9499852
file_error = 0
tail = 86346563
#5 0x000000000055226d in Fcommand_error_default_function (data=86346515,
context=9458692, signal=23712) at keyboard.c:1026
sf = 0x129aca0
#6 0x00000000005ec8f8 in Ffuncall (nargs=4, args=0x7ffe058b14b0) at eval.c:2641
internal_argbuf = {0, 0, 140728991421808, 5581510, 0, 5581464, 9458692,
140728991421504}
fun = 9446293
original_fun = 321456
funcar = 9458692
numargs = 3
lisp_numargs = 5547072
val = 23712
internal_args = 0x7ffe058b14b8
count = 2
#7 0x00000000005ec33d in call3 (fn=321456, arg1=86346515, arg2=9458692, arg3=23712)
at eval.c:2509
No locals.
#8 0x0000000000552105 in cmd_error_internal (data=86346515, context=0x7ffe058b1520 "")
at keyboard.c:981
No locals.
#9 0x0000000000552019 in cmd_error (data=86346515) at keyboard.c:950
old_level = 0
old_length = 0
macroerror = "\000\000\000\000\000\000\000\000\256\254^\000\000\000\000\000\000\000\000\000\001\000\000\000\203j\021\001\000\000\000\000\260\323\306\000\000\000\000\000`\304\354\n\000\000\000\000A\001"
#10 0x00000000005e9656 in internal_condition_case (bfun=0x5526bc <command_loop_1>,
---Type <return> to continue, or q <return> to quit---
handlers=18912, hfun=0x551ea6 <cmd_error>) at eval.c:1290
val = 86346515
val = 5546463
c = 0x1542ca0
#11 0x00000000005523c3 in command_loop_2 (ignore=0) at keyboard.c:1088
val = 2
#12 0x00000000005e8e20 in internal_catch (tag=45312, func=0x55239a <command_loop_2>,
arg=0) at eval.c:1057
val = 5546463
c = 0x1542b70
#13 0x0000000000552365 in command_loop () at keyboard.c:1067
No locals.
#14 0x0000000000551a6e in recursive_edit_1 () at keyboard.c:673
count = 1
val = 140728991422112
#15 0x0000000000551c02 in Frecursive_edit () at keyboard.c:744
count = 0
buffer = 0
#16 0x000000000054fafd in main (argc=1, argv=0x7ffe058b18a8) at emacs.c:1643
dummy = 0
stack_bottom_variable = 0 '\000'
do_initial_setlocale = true
dumping = false
skip_args = 0
rlim = {
rlim_cur = 8720000,
rlim_max = 18446744073709551615
}
no_loadup = false
junk = 0x0
dname_arg = 0x0
ch_to_dir = 0x0
original_pwd = 0x0
Lisp Backtrace:
"command-error-default-function" (0x58b14b8)
(gdb)
--8<---------------cut here---------------end--------------->8---
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