compiz crashed with SIGSEGV in intel_miptree_release()

[Kiril]

After several window open/close actions (or icon on unity panel) the compiz crashes.

Attached file is fast test case.

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: Thu Mar 15 18:15:19 2012
ExecutablePath: /usr/bin/compiz
ExecutableTimestamp: 1331544713
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120221)
ProcCmdline: compiz --replace
ProcCwd: /home/mik
SegvAnalysis:
 Segfault happened at: 0x7febd7b4b5a9 <intel_miptree_release+9>: mov (%rdi),%rcx
 PC (0x7febd7b4b5a9) 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 lpadmin plugdev sambashare sudo

[Kiril (kiril-mik-os)]

Graphics: 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

[Kiril (kiril-mik-os)]

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
 Subsystem: ASUSTeK Computer Inc. Device 16f2
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 45
 Region 0: Memory at dd400000 (64-bit, non-prefetchable) [size=4M]
 Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
 Region 4: I/O ports at e000 [size=64]
 Expansion ROM at <unassigned> [disabled]
 Capabilities: <access denied>
 Kernel driver in use: i915
 Kernel modules: i915

[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.