compiz crashed with SIGSEGV in unsafe_free()

[userDepth]

crash happened after minutes of session. Didn't notice any changes in display.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.04.18~13.04-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-22.33-generic 3.8.11
Uname: Linux 3.8.0-22-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CrashCounter: 1
Date: Sat May 25 08:49:07 2013
Disassembly: => 0x20000000: Cannot access memory at address 0x20000000
ExecutablePath: /usr/bin/compiz
InstallationDate: Installed on 2013-04-25 (29 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x20000000: Cannot access memory at address 0x20000000
 PC (0x20000000) not located in a known VMA region (needed executable region)!
SegvReason: executing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.1.1.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.1.1.so.1
 read_builtins(unsigned int, char const*, char const**, unsigned int) () from /usr/lib/x86_64-linux-gnu/libdricore9.1.1.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.1.1.so.1
Title: compiz crashed with SIGSEGV in read_builtins()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 unsafe_free (info=0x2185350) at ../../../../../src/glsl/ralloc.c:243
 unsafe_free (info=0x21158d0) at ../../../../../src/glsl/ralloc.c:238
 operator delete (mem=0x2115900) at ../../../src/glsl/glsl_parser_extras.h:90
 read_builtins (target=target@entry=35633, protos=protos@entry=0x7f6584a74a20 <prototypes_for_110_glsl> "(\n(function radians\n (signature float\n (parameters\n (declare (in) float degrees))\n ())\n (signature vec2\n (parameters\n (declare (in) vec2 degrees))\n ())\n (signature vec3\n (p"..., functions=functions@entry=0x7f6584d6fc80 <functions_for_110_glsl>, count=count@entry=60) at ../../../src/glsl/builtin_function.cpp:80

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix. These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes. Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag “desktop-bugscrub-reopen”. See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.