redisplay problem (compact_small_strings)

[Reiner Steib]

Hi,

while using Gnus and ielm, Emacs seems to be caught in a redisplay
loop.  The minibuffer is flickering all the time and I cannot abort
with C-g.  This has happened to me several times during the last one
or two weeks.  IIRC, Gnus and ielm were always involved.

Now I attached the debugger and got the attached backtrace.  The Emacs
session is still running under gdb, so I can provide more informations
when needed later (but I will probably be on holiday until Friday).

Version and settings:

In GNU Emacs 21.3.50.11 (i686-pc-linux-gnu, GTK+ Version 2.2.1)
 of 2004-09-10 on lumberjack
configured using `configure '--prefix=/import/xtra/emacs/HEAD' '--with-gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: POSIX
  value of $LC_CTYPE: en_US.ISO_8859-1
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: POSIX
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Bye, Reiner.

--8<---------------cut here---------------start------------->8---
[... some lines snipped ... I can provide the full output when needed. ]
select(0, NULL, NULL, NULL, {0, 10000}) = 0 (Timeout)
gettimeofday({1095088410, 901907}, NULL) = 0
write(4, "F\4\7\0\311\343\202\3LJ\203\3\0\0\0\0Z\2\16\0\0\0\364\2"..., 36) = 36
gettimeofday({1095088410, 905443}, NULL) = 0
stat64("/home/dept/ste/.emacs.d/auto-save-list", {st_mode=S_IFDIR|0711, 
st_size=8192, ...}) = 0
open("/home/dept/ste/.emacs.d/auto-save-list", 
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 7
fstat64(7, {st_mode=S_IFDIR|0711, st_size=8192, ...}) = 0
fcntl64(7, F_SETFD, FD_CLOEXEC)         = 0
getdents64(7, /* 56 entries */, 4096)   = 3504
getdents64(7, /* 0 entries */, 4096)    = 0
close(7)                                = 0
stat64("/import/xtra/emacs/HEAD/share/emacs/21.3.50/etc/HELLO", 
{st_mode=S_IFREG|0644, st_size=3727, ...}) = 0
open("/import/xtra/emacs/HEAD/share/emacs/21.3.50/etc/HELLO", 
O_RDONLY|O_LARGEFILE) = 7
close(7)                                = 0
write(4, "7\4\6\0MJ\203\3\311\343\202\3\5\0\0\0\6\0\0\0\375\377\0"..., 52) = 52
gettimeofday({1095088410, 915006}, NULL) = 0
gettimeofday({1095088410, 915024}, NULL) = 0
select(0, NULL, NULL, NULL, {0, 10000}) = 0 (Timeout)
gettimeofday({1095088410, 922004}, NULL) = 0
[...]
gettimeofday({1095088411, 61949}, NULL) = 0
select(0, NULL, NULL, NULL, {0, 10000}) = 0 (Timeout)
gettimeofday({1095088411, 71901}, NULL) = 0
write(4, "F\4\7\0\311\343\202\3MJ\203\3\0\0\0\0Z\2\16\0\0\0\364\2"..., 36) = 36
gettimeofday({1095088411, 75434}, NULL) = 0
stat64("/home/dept/ste/.emacs.d/auto-save-list", {st_mode=S_IFDIR|0711, 
st_size=8192, ...}) = 0
Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
0x081705cc in compact_small_strings () at alloc.c:1913
1913    }
(gdb) bt
#0  0x081705cc in compact_small_strings () at alloc.c:1913
#1  0x0889ceb8 in ?? ()
#2  0x08173323 in gc_sweep () at alloc.c:5242
#3  0x08172605 in Fgarbage_collect () at alloc.c:4564
#4  0x0818722d in Feval (form=146262320) at eval.c:2151
#5  0x08186224 in internal_condition_case_2 (bfun=0x8186fd0 <Feval+96>, 
nargs=139162205, args=0x84204d1, handlers=135444416,
    hfun=0x8441ba1 <UP+214345>) at eval.c:1413
#6  0x0812b851 in parse_menu_item (item=146262320, notreal=138483385, 
inmenubar=17310423) at keyboard.c:7195
#7  0x0812bcf1 in parse_menu_item (item=146262320, notreal=0, inmenubar=0) at 
keyboard.c:7249
#8  0x080bb40b in single_menu_item (key=138713969, item=139162277, 
dummy=138483385, skp_v=0xbfffd430) at xmenu.c:520
#9  0x081330d0 in map_keymap_char_table_item (args=134984688, key=138483385, 
val=134984688) at keymap.c:669
#10 0x081332a0 in Fmap_keymap (function=134984688, keymap=134984688) at 
keymap.c:743
#11 0x080bb385 in single_keymap_panes (keymap=139161013, pane_name=138483385, 
prefix=139359777, notreal=139165085,
    maxdepth=134984688) at xmenu.c:478
#12 0x080bb4bd in single_menu_item (key=139359777, item=139163173, 
dummy=138483385, skp_v=0xbfffd590) at xmenu.c:629
#13 0x081330d0 in map_keymap_char_table_item (args=134984688, key=138483385, 
val=134984688) at keymap.c:669
#14 0x081332a0 in Fmap_keymap (function=134984688, keymap=134984688) at 
keymap.c:743
#15 0x080bb385 in single_keymap_panes (keymap=139165637, pane_name=138483385, 
prefix=138870697, notreal=139163309,
    maxdepth=134984688) at xmenu.c:478
#16 0x080bb4bd in single_menu_item (key=138870697, item=140116005, 
dummy=138483385, skp_v=0xbfffd6f0) at xmenu.c:629
#17 0x081330d0 in map_keymap_char_table_item (args=134984688, key=138483385, 
val=134984688) at keymap.c:669
#18 0x081332a0 in Fmap_keymap (function=134984688, keymap=134984688) at 
keymap.c:743
#19 0x080bb385 in single_keymap_panes (keymap=138916445, pane_name=138968243, 
prefix=138847065, notreal=140115853,
    maxdepth=134984688) at xmenu.c:478
#20 0x080bc7ff in parse_single_submenu (item_key=138847065, 
item_name=138968227, maps=138847065) at xmenu.c:1610
#21 0x080bcf97 in set_frame_menubar (f=0x8ad5a68, first_time=0, 
deep_p=138847065) at xmenu.c:1997
#22 0x0809dade in update_menu_bar (f=0x8ad5a68, save_match_data=0) at 
xdisp.c:8261
#23 0x0809d7df in prepare_menu_bars () at xdisp.c:8140
#24 0x0809f9d1 in redisplay_internal (preserve_echo_area=0) at xdisp.c:9806
#25 0x0809efed in redisplay () at xdisp.c:9410
---Type <return> to continue, or q <return> to quit---
#26 0x08125e9c in read_char (commandflag=1, nmaps=4, maps=0xbfffe2e0, 
prev_event=138483385, used_mouse_menu=0xbfffe318)
    at keyboard.c:2587
#27 0x0812d841 in read_key_sequence (keybuf=0xbfffe440, bufsize=30, 
prompt=138483385, dont_downcase_last=0,
    can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:8910
#28 0x08123867 in command_loop_1 () at keyboard.c:1552
#29 0x0818611d in internal_condition_case_1 (bfun=0x81236c0 
<command_loop_1+96>, arg=138544337, handlers=135410112, hfun=0)
    at eval.c:1370
#30 0x081234eb in top_level_1 () at keyboard.c:1323
#31 0x08185c5a in unwind_to_catch (catch=0x84116b9, value=0) at eval.c:1150
#32 0x081234a7 in command_loop_2 () at keyboard.c:1310
#33 0x08122ef2 in recursive_edit_1 () at keyboard.c:984
#34 0x0812303f in recursive_edit_unwind (info=138483385) at keyboard.c:1053
#35 0x08121793 in main (argc=0, argv=0xbfffea24) at emacs.c:1064
#36 0x4064c8ae in __libc_start_main () from /lib/libc.so.6
(gdb) xbacktrace
(gdb) 
--8<---------------cut here---------------end--------------->8---