Спойлер
#23 0x7f75bbec7786 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x156
#24 0x7f75bbec880c in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x4bc
#25 0x7f75bbec7786 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x156
#26 0x7f75bbec880c in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x4bc
#27 0x7f75bbec7786 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x156
#28 0x7f75bbec880c in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x4bc
#29 0x7f75bbec7786 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x156
#30 /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5(+0x16a3b6) [0x7f75bbe983b6]
#31 /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5(+0x16b649) [0x7f75bbe99649]
#32 0x7f75bbeb944f in QWidgetPrivate::syncBackingStore() from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x3f
#33 0x7f75bbece085 in QWidget::event(QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x2b5
#34 0x7f75bbfe384b in QMainWindow::event(QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x15b
#35 0x7f75c034cbe7 in Gui::MainWindow::event(QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libFreeCADGui.so+0x57
#36 0x7f75bbe8bc6c in QApplicationPrivate::notify_helper(QObject*, QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x9c
#37 0x7f75bbe902ea in QApplication::notify(QObject*, QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5+0x3fa
#38 0x7f75c00d1371 in Gui::GUIApplication::notify(QObject*, QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libFreeCADGui.so+0x41
#39 0x7f75bb4dd425 in QCoreApplication::notifyInternal2(QObject*, QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Core.so.5+0x75
#40 0x7f75bb4df26a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Core.so.5+0x1ca
#41 /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5(+0x46c8c2) [0x7f75bc19a8c2]
#42 /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Widgets.so.5(+0x475019) [0x7f75bc1a3019]
#43 0x7f75bb508f76 in QObject::event(QEvent*) from /tmp/.mount_FreeCACUrc6A/usr/bin/../lib/libQt5Core.so.5+0x2a6
#44 0x7f75bc1ae7bb in QGraphicsScene::event(QEvent*) from