update-manager assert failure: python: ../../src/xcb_io.c :178 : dequeue_pending_request: L'assertion « !xcb_xlib_unknown_req_in_deq » a échoué.

[Mickael-goetz]

the bug appeared in Ubuntu 11.10 after an important update (like 208 packages to update)
it was first difficult to get the update to complete and then, once i managed to get it installed, i couldn't log into the "Ubuntu" session from LightDM.
i tried to reinstall the package "lightdm-gtk-greeter" and it's when the crash occured.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.15
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
AssertionMessage: python: ../../src/xcb_io.c :178 : dequeue_pending_request: L'assertion « !xcb_xlib_unknown_req_in_deq » a échoué.
Date: Thu Aug 25 23:52:52 2011
ExecutablePath: /usr/bin/update-manager
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110812)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/update-manager --dist-upgrade
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: update-manager
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
Title: update-manager assert failure: python: ../../src/xcb_io.c :178 : dequeue_pending_request: L'assertion « !xcb_xlib_unknown_req_in_deq » a échoué.
UpgradeStatus: Upgraded to oneiric on 2011-08-25 (0 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __GI___assert_fail (assertion=0x7fc83c9e5705 "!xcb_xlib_unknown_req_in_deq", file=<optimized out>, line=178, function=<optimized out>) at assert.c:81
 dequeue_pending_request (dpy=<optimized out>, req=<optimized out>) at ../../src/xcb_io.c:176
 _XReply (dpy=0x1b07f70, rep=0x7fff18dbfa40, extra=0, discard=1) at ../../src/xcb_io.c:638
 XInternAtom (dpy=0x1b07f70, name=0x22d2180 "GDK_TIMESTAMP_PROP", onlyIfExists=<optimized out>) at ../../src/IntAtom.c:181
 gdk_x11_atom_to_xatom_for_display (atom=0x91, display=0x1af6000) at /build/buildd/gtk+3.0-3.1.12/./gdk/x11/gdkproperty-x11.c:246

[Robert Roth (evfool)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.