compiz crashed with SIGSEGV in __GI___libc_free()

[MP]

compiz crashed

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: compiz-core 1:0.9.12.2+16.04.20160209-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3
Uname: Linux 4.4.0-10-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,staticswitcher,workarounds,scale,expo,ezoom,dbus]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sun Mar 6 16:59:55 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.0.14, 4.4.0-10-generic, x86_64: installed
 virtualbox, 5.0.14, 4.4.0-8-generic, x86_64: installed
 virtualbox, 5.0.14, 4.4.0-9-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [1458:d000]
 Advanced Micro Devices, Inc. [AMD/ATI] Redwood PRO [Radeon HD 5550/5570/5630/6510/6610/7570] [1002:68d9] (prog-if 00 [VGA controller])
   Subsystem: XFX Pine Group Inc. Redwood PRO [Radeon HD 5550/5570/5630/6510/6610/7570] [1682:3051]
InstallationDate: Installed on 2015-12-23 (73 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151209)
MachineType: Gigabyte Technology Co., Ltd. H81M-D2V
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=de_DE.UTF-8
 LANGUAGE=de_DE
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-10-generic root=UUID=5c5ccdc2-ea14-4f1c-bb22-98a20123f659 ro noprompt persistent quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7effd05b7932 <__GI___libc_free+34>: mov -0x8(%rdi),%rax
 PC (0x7effd05b7932) ok
 source "-0x8(%rdi)" (0xfffffffffffffff7) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 __GI___libc_free (mem=0xffffffffffffffff) at malloc.c:2933
 XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libcompiz_core.so.ABI-20151010
 PrivateWindow::processMap() () from /usr/lib/x86_64-linux-gnu/libcompiz_core.so.ABI-20151010
 CompScreenImpl::_handleEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libcompiz_core.so.ABI-20151010
Title: compiz crashed with SIGSEGV in __GI___libc_free()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 06/25/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: FB
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: H81M-D2V
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrFB:bd06/25/2014:svnGigabyteTechnologyCo.,Ltd.:pnH81M-D2V:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH81M-D2V:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: H81M-D2V
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.12.2+16.04.20160209-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160218-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build1
xserver.bootTime: Sat Mar 5 18:35:42 2016
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Video Bus KEYBOARD, id 7
 input Power Button KEYBOARD, id 8
 input Logitech USB Optical Mouse MOUSE, id 9
 input AT Translated Set 2 keyboard KEYBOARD, id 10
xserver.errors: systemd-logind: failed to get session: PID 1403 does not belong to any known session
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.17.3-2ubuntu4
xserver.video_driver: radeon

[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 #1551866, 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.