Bug 1887877

Summary: supercollider segmentation fault in qt doActivate when starting
Product: [Fedora] Fedora Reporter: Tristan Cacqueray <tdecacqu>
Component: supercolliderAssignee: Tristan Cacqueray <tdecacqu>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: seb, tdecacqu
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Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: supercollider-3.11.1-1.fc33 Doc Type: If docs needed, set a value
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Last Closed: 2020-10-23 22:13:33 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Tristan Cacqueray 2020-10-13 14:02:13 UTC 
Description of problem:

scide segfault on start

Version-Release number of selected component (if applicable): supercollider-3.10.4-6.fc33.x86_64


How reproducible:

always


Additional info:

```
Thread 1 "scide" received signal SIGSEGV, Segmentation fault.
0x00007ffff6e22d6b in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5
(gdb) bt
#0  0x00007ffff6e22d6b in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5
#1  0x00007ffff735f3c2 in QGuiApplication::screenAdded(QScreen*) () from /lib64/libQt5Gui.so.5
#2  0x00007ffff734f71c in QWindowSystemInterface::handleScreenAdded(QPlatformScreen*, bool) () from /lib64/libQt5Gui.so.5
#3  0x00007fffea1cf8e0 in QXcbConnection::initializeScreens() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007fffea1ab140 in QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) () from /lib64/libQt5XcbQpa.so.5
#5  0x00007fffea1addf3 in QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) () from /lib64/libQt5XcbQpa.so.5
#6  0x00007fffea2a946f in QXcbIntegrationPlugin::create(QString const&, QStringList const&, int&, char**) () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#7  0x00007ffff735842b in QPlatformIntegrationFactory::create(QString const&, QStringList const&, int&, char**, QString const&) () from /lib64/libQt5Gui.so.5
#8  0x00007ffff7362b70 in QGuiApplicationPrivate::createPlatformIntegration() () from /lib64/libQt5Gui.so.5
#9  0x00007ffff7364180 in QGuiApplicationPrivate::createEventDispatcher() () from /lib64/libQt5Gui.so.5
#10 0x00007ffff6dfae96 in QCoreApplicationPrivate::init() () from /lib64/libQt5Core.so.5
#11 0x00007ffff7366ad4 in QGuiApplicationPrivate::init() () from /lib64/libQt5Gui.so.5
#12 0x00007ffff7999ef9 in QApplicationPrivate::init() () from /lib64/libQt5Widgets.so.5
#13 0x00005555555b5479 in main ()
```
Comment 1 Tristan Cacqueray 2020-10-13 14:32:35 UTC 
That seems related to lto and missing PIC flag. Rebuilding did not work though because of:

```
/builddir/build/BUILD/SuperCollider-Source/QtCollider/primitives/prim_QPen.cpp:37:21: error: aggregate 'QPainterPath path' has incomplete type and cannot be defined
   37 | static QPainterPath path;
      |                     ^~~~
/builddir/build/BUILD/SuperCollider-Source/QtCollider/primitives/prim_QPen.cpp: In function 'bool QtCollider::beginPainting(QPainter*, QObject*)':
/builddir/build/BUILD/SuperCollider-Source/QtCollider/primitives/prim_QPen.cpp:61:25: error: invalid use of incomplete type 'class QPainterPath'
```

I started another scratch build using the latest supercollider version here: https://koji.fedoraproject.org/koji/taskinfo?taskID=53380131
Comment 2 seb 2020-10-13 15:27:11 UTC 
Additional info: https://bugzilla.redhat.com/show_bug.cgi?id=1887190
Comment 3 Tristan Cacqueray 2020-10-13 16:43:11 UTC 
Alright, latest version and -fPIC fixed the issue. Here is the correct scratch build: https://koji.fedoraproject.org/koji/taskinfo?taskID=53381214 and the f33 build is happening here: https://koji.fedoraproject.org/koji/taskinfo?taskID=53386652
Comment 4 Fedora Update System 2020-10-13 20:49:06 UTC 
FEDORA-2020-e6d5c17f55 has been submitted as an update to Fedora 33. https://bodhi.fedoraproject.org/updates/FEDORA-2020-e6d5c17f55
Comment 5 Fedora Update System 2020-10-13 22:39:52 UTC 
FEDORA-2020-e6d5c17f55 has been pushed to the Fedora 33 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-e6d5c17f55`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-e6d5c17f55

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 6 Fedora Update System 2020-10-23 22:13:33 UTC 
FEDORA-2020-e6d5c17f55 has been pushed to the Fedora 33 stable repository.
If problem still persists, please make note of it in this bug report.