[Bug 930839] Re: update-manager crashed with SIGABRT in __assert_fail_base(): Assertion !xcb_xlib_unknown_req_in_deq failed in dequeue_pending_request

[Bryce Harrington]

This error is also an assertion being hit in libxcb, rather than a
segfault, so it doesn't imply a bug in the library but rather that the
library is catching a bug from higher up in the stack.   The error
message is suggesting it could be an issue in how threading is done;
making XCB calls from multiple threads can trigger such problems for
instance.  This may have the same root cause as bug #930004.

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https://bugs.launchpad.net/bugs/930839

Title:
  update-manager crashed with SIGABRT in __assert_fail_base(): Assertion
  !xcb_xlib_unknown_req_in_deq failed in dequeue_pending_request

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  hell i dont know what is going on any more.

  [xcb] Unknown request in queue while dequeuing
  [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
  [xcb] Aborting, sorry about that.
  python: ../../src/xcb_io.c:178: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.4
  ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
  Uname: Linux 3.2.0-15-generic i686
  ApportVersion: 1.91-0ubuntu1
  Architecture: i386
  Date: Sat Feb 11 21:33:21 2012
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:

  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/update-manager --dist-upgrade
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Signal: 6
  SourcePackage: update-manager
  StacktraceTop:
   raise () from /lib/i386-linux-gnu/libc.so.6
   abort () from /lib/i386-linux-gnu/libc.so.6
   ?? () from /lib/i386-linux-gnu/libc.so.6
   __assert_fail () from /lib/i386-linux-gnu/libc.so.6
   ?? () from /usr/lib/i386-linux-gnu/libX11.so.6
  Title: update-manager crashed with SIGABRT in raise()
  UpgradeStatus: Upgraded to precise on 2012-02-12 (0 days ago)
  UserGroups:

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