[Bug 902043] Re: emacs -nw freezes with 100% CPU with glib 2.31

[Launchpad Bug Tracker]

This bug was fixed in the package emacs23 - 23.3+1-1ubuntu7

---------------
emacs23 (23.3+1-1ubuntu7) precise; urgency=low

  * debian/patches/emacs-xgselect.patch: Initialize xgselect in
    function xg_select when gfds_size == 0.  Fixes 100% CPU startup
    freeze with glib 2.31.  (LP: #902043)
 -- Anders Kaseorg <andersk at mit.edu>   Fri, 09 Dec 2011 02:17:48 -0500

** Changed in: emacs23 (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/902043

Title:
  emacs -nw freezes with 100% CPU with glib 2.31

Status in GNU Emacs:
  Unknown
Status in “emacs23” package in Ubuntu:
  Fix Released
Status in Fedora:
  Unknown

Bug description:
  After glib2.0 2.31.2 was uploaded to precise, ‘emacs -nw’ freezes at
  startup, going into an infinite loop at 100% CPU usage.  A backtrace
  starts as follows:

  #0  xg_select (max_fds=4, rfds=0x7fffd264a5b0, wfds=0x0, efds=0x0, 
      timeout=0x7fffd264a800) at xgselect.c:58
  #1  0x000000000059cd8e in wait_reading_process_output (time_limit=1, 
      microsecs=996270, read_kbd=<optimized out>, do_display=1, 
      wait_for_cell=11690546, wait_proc=0x0, just_wait_proc=0) at process.c:4981
  #2  0x00000000004f0309 in kbd_buffer_get_event (end_time=0x7fffd264aca0, 
      used_mouse_menu=0x0, kbp=<synthetic pointer>) at keyboard.c:4177
  #3  read_char (commandflag=0, nmaps=0, maps=0x0, prev_event=11690642, 
      used_mouse_menu=0x0, end_time=0x7fffd264aca0) at keyboard.c:3081
  …

  which matches a known upstream bug: http://debbugs.gnu.org/9754 .
  Downgrading to libglib2.0-0 2.30.1-2ubuntu1 makes the problem
  disappear.

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