unity8 crashed with SIGSEGV in QOpenGLContext::shareGroup()

[Michał Sawicz]

When testing a silo with https://code.launchpad.net/~mzanetti/unity8/onthefly-debugging/+merge/298801 unity8 crashed on me when trying to enable "overdraw" visualisation.

I have an external monitor connected, maybe that impacts.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity8 8.14+16.04.20160731-0ubuntu1 [origin: LP-PPA-ci-train-ppa-service-landing-073]
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Mon Aug 1 10:49:57 2016
ExecutablePath: /usr/bin/unity8
ExecutableTimestamp: 1470005693
InstallationDate: Installed on 2016-05-06 (86 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcCmdline: unity8 --mode=full-shell
ProcCwd: /home/test
ProcEnviron:
 LANGUAGE=pl
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7ffac9a53630 <_ZNK14QOpenGLContext10shareGroupEv>: mov 0x8(%rdi),%rax
 PC (0x7ffac9a53630) ok
 source "0x8(%rdi)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity8
StacktraceTop:
 QOpenGLContext::shareGroup() const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 QOpenGLFunctions::initializeOpenGLFunctions() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 QSGBatchRenderer::Renderer::Renderer(QSGRenderContext*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
 QSGRenderContext::createRenderer() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
Title: unity8 crashed with SIGSEGV in QOpenGLContext::shareGroup()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: lxd nopasswdlogin sudo

[Apport retracing service (apport)]

StacktraceTop:
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[Apport retracing service (apport)]

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate a useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

libqgsttools-p1 version 5.5.1-4ubuntu4~~xenialoverlay1 required, but 5.5.1-4ubuntu2 is available
unity-webapps-qml version 0.1+16.04.20160713-0ubuntu1 required, but 0.1+16.04.20160114-0ubuntu1 is available
no debug symbol package found for xserver-xorg
package aethercast-tools does not exist, ignoring
libandroid-properties1 version 0.1.0+git20151016+6d424c9-0ubuntu18~xenial2 required, but 0.1.0+git20151016+6d424c9-0ubuntu7 is available
ubuntu-download-manager version 1.2+16.04.20160722.1-0ubuntu1 required, but 1.2+16.04.20160408-0ubuntu1 is available
accountsservice-ubuntu-schemas version 0.0.7+16.04.20160730-0ubuntu1 required, but 0.0.5+16.04.20160307-0ubuntu1 is available
libqt5positioning5-plugins version 5.5.1-3ubuntu3~xenialoverlay1 required, but 5.5.1-3ubuntu1 is available
qml-module-qtquick-window2 version 5.5.1-2ubuntu7~xenialoverlay1~4 required, but 5.5.1-2ubuntu6 is available
no debug symbol package found for libfribidi0
libsystemsettings1 version 0.4+16.04.20160730-0ubuntu1 required, but 0.3+16.04.20160330-0ubuntu1 is available
libudm-common1 version 1.2+16.04.20160722.1-0ubuntu1 required, but 1.2+16.04.20160408-0ubuntu1 is available
mediascanner2.0 version 0.111+16.04.20160526-0ubuntu1 required, but 0.111+16.04.20160317-0ubuntu1 is available
no debug symbol package found for python3-cups
unity8-private version 8.14+16.04.20160731-0ubuntu1 required, but 8.12+16.04.20160401-0ubuntu1 is available
indicator-keyboard version 0.0.0+16.04.20160730-0ubuntu1 required, but 0.0.0+16.04.20151125-0ubuntu1 is available
qtmir-desktop version 0.4.8+16.04.20160730-0ubuntu1 required, but 0.4.8+16.04.20160330-0ubuntu1 is available
click version 0.4.43+16.04.20160203-0ubuntu3 required, but 0.4.43+16.04.20160203-0ubuntu2 is available
unity-scope-mediascanner2 version 0.2+16.04.20160620.1-0ubuntu1 required, but 0.2+16.04.20160225-0ubuntu1 is available
ubuntu-keyboard-data version 0.100+16.04.20160712-0ubuntu1 required, but 0.99.trunk.phablet2+16.04.20160226.1-0ubuntu1 is available
thumbnailer-service version 2.4+16.04.20160719-0ubuntu1 required, but 2.4+16.04.20160321-0ubuntu1 is available
unity-scope-click version 0.1.1+16.04.20160705-0ubuntu1 required, but 0.1.1+16.04.20160330-0ubuntu1 is available
qtdeclarative5-qtmir-plugin version 0.4.8+16.04.20160730-0ubuntu1 required, but 0.4.8+16.04.20160330-0ubuntu1 is available
libqt5qml5 version 5.5.1-2ubuntu7~xenialoverlay1~4 required, but 5.5.1-2ubuntu6 is available
package evolution-data-server-utouch does not exist, ignoring
indicator-datetime version 15.10+16.04.20160707-0ubuntu1 required, but 15.10+16.04.20160406-0ubuntu1 is available
qtdeclarative5-ubuntu-syncmonitor0.1 version 0.2+16.04.20160701-0ubuntu1 required, but 0.2+16.04.20160304-0ubuntu1 is available
libhybris-utils version 0.1.0+git20151016+6d424c9-0ubuntu18~xenial2 required, but 0.1.0+git20151016+6d424c9-0ubuntu7 is available
libpulsedsp version 1:8.0-0ubuntu5 requ...

[Daniel van Vugt (vanvugt)]

Another popular crash in the same class -> bug 1606521