compiz crashed with SIGSEGV in intel_miptree_release()

[Graham T]

Opened gedit from a terminal session with "gedit /var/log/apt/history.log" which initialised in maximised state (from last usage).

Attempting to resize to a window using the min/max button did not respond, neither did double-clicking the title-bar. A few seconds later everything bar the desktop background disappeared followed some seconds later by the various running application windows reappearing - with gedit now in a windowed state - along with the crash report for compiz dialog.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.6.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
Date: Tue Mar 20 15:40:59 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f8f41ff05a9 <intel_miptree_release+9>: mov (%rdi),%rcx
 PC (0x7f8f41ff05a9) ok
 source "(%rdi)" (0x00000220) not located in a known VMA region (needed readable region)!
 destination "%rcx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 intel_miptree_release () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
 intel_update_renderbuffers () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
 intelSetTexBuffer2 () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
 TfpTexture::bindPixmapToTexture(unsigned long, int, int, int) () from /usr/lib/compiz/libopengl.so
 boost::detail::function::function_invoker4<GLTexture::List (*)(unsigned long, int, int, int), GLTexture::List, unsigned long, int, int, int>::invoke(boost::detail::function::function_buffer&, unsigned long, int, int, int) () from /usr/lib/compiz/libopengl.so
Title: compiz crashed with SIGSEGV in intel_miptree_release()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip fuse lpadmin plugdev sambashare sudo

[Graham T (grahamt-manichostingservices)]

I cannot get this issue to reproduce itself - so probably nothing to worry about.

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #926379, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.