GC bug?

[Stephen Berman]

I made a diary entry and then called calendar and Emacs immediately
hung or went into an infinite loop, presumably in diary-list-entries,
since the last message was "Preparing diary...".  I could get out of
the loop by typing C-g.  The same thing happened when I tried to save
the diary file.  I started a fresh Emacs and there was no such
problem.  I still had the other Emacs running so I attached it to gdb,
induced the loop and got this partial backtrace:

#0  input_available_signal (signo=159874388) at keyboard.c:6862
#1  <signal handler called>
#2  mark_object (arg=159874388) at alloc.c:5329
#3  0x0813cc5a in mark_object (arg=158396404) at alloc.c:5305
#4  0x0813ce28 in mark_object (arg=145277573) at alloc.c:5330
#5  0x0813ca14 in mark_object (arg=138947194) at alloc.c:5455
#6  0x0813c908 in mark_object (arg=137521625) at alloc.c:5342
#7  0x0813ca14 in mark_object (arg=157547901) at alloc.c:5455
#8  0x0813ce28 in mark_object (arg=162666596) at alloc.c:5330
#9  0x0813ca14 in mark_object (arg=137864437) at alloc.c:5455
#10 0x0813c91c in mark_object (arg=137893745) at alloc.c:5344
#11 0x0813ca14 in mark_object (arg=137409373) at alloc.c:5455
#12 0x0813c91c in mark_object (arg=137516657) at alloc.c:5344
#13 0x0813ca14 in mark_object (arg=138061381) at alloc.c:5455
#14 0x0813ce28 in mark_object (arg=139201516) at alloc.c:5330
#15 0x0813ca14 in mark_object (arg=138063749) at alloc.c:5455
#16 0x0813c91c in mark_object (arg=139046045) at alloc.c:5344
#17 0x0813ca14 in mark_object (arg=137652373) at alloc.c:5455
#18 0x0813c912 in mark_object (arg=137400325) at alloc.c:5343
#19 0x0813ca14 in mark_object (arg=137645093) at alloc.c:5455
#20 0x0813ca14 in mark_object (arg=137400541) at alloc.c:5455
#21 0x0813c91c in mark_object (arg=137635097) at alloc.c:5344
---Type <return> to continue, or q <return> to quit---
#22 0x0813ca14 in mark_object (arg=140790445) at alloc.c:5455
#23 0x0813caa9 in mark_object (arg=143108924) at alloc.c:5205
#24 0x0813c912 in mark_object (arg=143287745) at alloc.c:5343
#25 0x0813ca14 in mark_object (arg=142927093) at alloc.c:5455
#26 0x0813caa9 in mark_object (arg=143209756) at alloc.c:5205
#27 0x0813c912 in mark_object (arg=144636505) at alloc.c:5343
#28 0x0813c908 in mark_object (arg=150157333) at alloc.c:5342
#29 0x0813c91c in mark_object (arg=162273541) at alloc.c:5344
#30 0x0818d9ec in traverse_intervals_noorder (tree=0x996b6f8,
    function=0x813cfe0 <mark_interval>, arg=137379857) at intervals.c:208
#31 0x0813a248 in mark_interval_tree (tree=<value optimized out>)
    at alloc.c:1496
#32 0x0813c818 in mark_buffer (buf=<value optimized out>) at alloc.c:5492
#33 0x0813cb93 in mark_object (arg=148405002) at alloc.c:5383
#34 0x0813c908 in mark_object (arg=147560153) at alloc.c:5342
#35 0x0813ce28 in mark_object (arg=149679932) at alloc.c:5330
#36 0x0813c912 in mark_object (arg=153915369) at alloc.c:5343
#37 0x0813ce28 in mark_object (arg=154127532) at alloc.c:5330
#38 0x0813c912 in mark_object (arg=154103817) at alloc.c:5343
#39 0x0813ca14 in mark_object (arg=153387797) at alloc.c:5455
#40 0x0813c91c in mark_object (arg=137468905) at alloc.c:5344

...and so on, till I quit the backtrace.  I then killed some of the
buffers I had open (not that many were open, I think <30) and at that
point the problem with the calendar and diary stopped.  I've continued
running the same Emacs process under gdb for hours since then, but the
hang up or loop has not returned.


In GNU Emacs 22.0.50.24 (i686-pc-linux-gnu, GTK+ Version 2.8.3)
 of 2005-10-20 on escher
X server distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure '--with-x-toolkit=gtk''

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: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  tabbar-mwheel-mode: t
  tabbar-mode: t
  recentf-mode: t
  show-paren-mode: t
  display-time-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  tooltip-mode: t
  auto-compression-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t

Recent input:
d d SPC d SPC n SPC n <help-echo> <help-echo> <select-window> 
<help-echo> <down-mouse-5> <mouse-5> <down-mouse-5> 
<mouse-5> <down-mouse-5> <mouse-5> SPC h n n <f1> d 
d d d d SPC n n SPC n <f1> d d d d d d d d d d d d 
d d d d d d d d d d d d d d d d d d d d d d d d d SPC 
<select-window> <help-echo> h n SPC n <f1> d d d d 
d d d q M-x b u g <M-backspace> r e p o <tab> r <tab> 
<return>

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