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Bug
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Resolution: Unresolved
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P4: Low
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None
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5.6.0
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None
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Using Ubuntu 14.04 with XServer,
MacOS X El Capitan
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macOS
This bug occurs when instantiating several QOpenGLWidgets on different screens.
The bug does not happen when all QOpenGLWidget are placed on a single screen.
I provided a minimal example to reproduce bug in Qt 5.6.0 when exiting a QApplication with several QOpenGLWidget on different screens on Github:
https://github.com/WilstonOreo/qt5qopenglwidget
When closing all widgets manually, the application exits and a seg fault occurs with the following backtrace:
#0 0x00007ffff70e9a80 in QObject::thread() const () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #1 0x00007ffff5e8523a in QOffscreenSurface::create() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #2 0x00007ffff5e854e8 in QOffscreenSurface::setScreen(QScreen*) () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #3 0x00007ffff70eacef in QMetaObject::activate(QObject*, int, int, void**) () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007ffff70eb9ef in QObject::destroyed(QObject*) () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #5 0x00007ffff70f3220 in QObject::~QObject() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #6 0x00007ffff5ea1a03 in QScreen::~QScreen() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #7 0x00007ffff5ea1da9 in QScreen::~QScreen() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #8 0x00007ffff5e651ff in QPlatformIntegration::destroyScreen(QPlatformScreen*) () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #9 0x00007fffefe058d3 in QXcbConnection::~QXcbConnection() () from /home/micha/Projects/Qt/5.6/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5 #10 0x00007fffefe05f59 in QXcbConnection::~QXcbConnection() () from /home/micha/Projects/Qt/5.6/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5 #11 0x00007fffefe0cc2e in QXcbIntegration::~QXcbIntegration() () from /home/micha/Projects/Qt/5.6/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5 #12 0x00007fffefe0cd09 in QXcbIntegration::~QXcbIntegration() () from /home/micha/Projects/Qt/5.6/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5 #13 0x00007ffff5e72d84 in QGuiApplicationPrivate::~QGuiApplicationPrivate() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #14 0x00007ffff76ba7b9 in QApplicationPrivate::~QApplicationPrivate() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #15 0x00007ffff70f2fe6 in QObject::~QObject() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #16 0x00007ffff70c3818 in QCoreApplication::~QCoreApplication() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #17 0x00007ffff5e72b8f in QGuiApplication::~QGuiApplication() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Gui.so.5 #18 0x00007ffff76bbfd4 in QApplication::~QApplication() () from /home/micha/Projects/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #19 0x0000000000400d2f in main (argc=1, argv=0x7fffffffe2a8) at main.cpp:16
Backtrace on MacOSX:
__TEXT 000000010aa24000-000000010aa27000 [ 12K] r-x/rwx SM=COW /Users/USER/*/qt5bug.app/Contents/MacOS/qt5bug Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 org.qt-project.QtCore 0x000000010b9ab2f4 QObject::thread() const + 4 1 org.qt-project.QtGui 0x000000010b1a6c11 QOffscreenSurface::create() + 113 2 org.qt-project.QtGui 0x000000010b1a6ffb QOffscreenSurface::setScreen(QScreen*) + 299 3 org.qt-project.QtCore 0x000000010b9b35bd QMetaObject::activate(QObject*, int, int, void**) + 749 4 org.qt-project.QtCore 0x000000010b9ab67f QObject::~QObject() + 271 5 org.qt-project.QtGui 0x000000010b1c6507 QScreen::~QScreen() + 679 6 org.qt-project.QtGui 0x000000010b1c654e QScreen::~QScreen() + 14 7 org.qt-project.QtGui 0x000000010b1850eb QPlatformIntegration::destroyScreen(QPlatformScreen*) + 43 8 libqcocoa.dylib 0x000000010eb1c0d1 QCocoaIntegration::~QCocoaIntegration() + 497 9 libqcocoa.dylib 0x000000010eb1c47e QCocoaIntegration::~QCocoaIntegration() + 14 10 org.qt-project.QtGui 0x000000010b194e01 QGuiApplicationPrivate::~QGuiApplicationPrivate() + 417 11 org.qt-project.QtWidgets 0x000000010aaa0b8e QApplicationPrivate::~QApplicationPrivate() + 14 12 org.qt-project.QtCore 0x000000010b9abd71 QObject::~QObject() + 2049 13 org.qt-project.QtWidgets 0x000000010aaa28f0 QApplication::~QApplication() + 992 14 com.yourcompany.qt5bug 0x000000010aa26d05 main + 389 (main.cpp:22) 15 com.yourcompany.qt5bug 0x000000010aa26b74 start + 52