#0  QOpenGLContext::functions (this=0x0) at /home/mauro/work/qt-git/qt5/qtbase/src/gui/kernel/qopenglcontext.cpp:731
#1  0x00007ffff69998bc in QSGBindableFboId::bind (this=0x7fffffffd470) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quick/scenegraph/coreapi/qsgrenderer.cpp:99
#2  0x00007ffff699a1e6 in QSGRenderer::renderScene (this=this@entry=0x555555cdc9e0, bindable=...) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quick/scenegraph/coreapi/qsgrenderer.cpp:238
#3  0x00007ffff699a711 in QSGRenderer::renderScene (this=0x555555cdc9e0, fboId=<optimized out>) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quick/scenegraph/coreapi/qsgrenderer.cpp:204
#4  0x00007ffff6a1dafe in QSGDefaultRenderContext::renderNextFrame (this=0x5555555d0670, renderer=0x555555cdc9e0, fboId=1) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quick/scenegraph/qsgdefaultrendercontext.cpp:223
#5  0x00007ffff6a9a896 in QQuickWindowPrivate::renderSceneGraph (this=this@entry=0x55555556f400, size=..., surfaceSize=...) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:541
#6  0x00007ffff6b8a045 in QQuickRenderControl::render (this=<optimized out>) at /home/mauro/work/qt-git/qt5.14.1-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qsize.h:123
#7  0x00007ffff7fbe25e in QQuickWidgetPrivate::render (this=this@entry=0x5555555cf0a0, needsSync=needsSync@entry=true) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:307
#8  0x00007ffff7fbe52c in QQuickWidgetPrivate::renderSceneGraph (this=this@entry=0x5555555cf0a0) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:358
#9  0x00007ffff7fbeda3 in QQuickWidget::timerEvent (this=<optimized out>, e=<optimized out>) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:1156
#10 0x00007ffff74fd50f in QObject::event (this=this@entry=0x7fffffffdd70, e=e@entry=0x7fffffffda70) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qobject.cpp:1316
#11 0x00007ffff7a11b04 in QWidget::event (this=this@entry=0x7fffffffdd70, event=event@entry=0x7fffffffda70) at /home/mauro/work/qt-git/qt5/qtbase/src/widgets/kernel/qwidget.cpp:9094
#12 0x00007ffff7fc2ab3 in QQuickWidget::event (this=0x7fffffffdd70, e=0x7fffffffda70) at /home/mauro/work/qt-git/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:1551
#13 0x00007ffff79c419a in QApplicationPrivate::notify_helper (this=this@entry=0x555555576790, receiver=receiver@entry=0x7fffffffdd70, e=e@entry=0x7fffffffda70)
    at /home/mauro/work/qt-git/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3685
#14 0x00007ffff79cf423 in QApplication::notify (this=0x7fffffffdd60, receiver=0x7fffffffdd70, e=0x7fffffffda70) at /home/mauro/work/qt-git/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3635
#15 0x00007ffff74c271d in QCoreApplication::notifyInternal2 (receiver=0x7fffffffdd70, event=0x7fffffffda70) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1092
#16 0x00007ffff74c29a6 in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1487
#17 0x00007ffff752ed46 in QTimerInfoList::activateTimers (this=0x5555555a9870) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:643
#18 0x00007ffff752f60c in timerSourceDispatch (source=<optimized out>) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:183
#19 0x00007ffff581984d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007ffff5819ad0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffff5819b73 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007ffff752f9c6 in QEventDispatcherGlib::processEvents (this=0x5555555b0990, flags=...) at /home/mauro/work/qt-git/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#23 0x00007ffff42b2652 in QXcbGlibEventDispatcher::processEvents (this=<optimized out>, flags=...) at /home/mauro/work/qt-git/qt5/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:143
#24 0x00007ffff74c01a7 in QEventLoop::processEvents (this=this@entry=0x7fffffffdcd0, flags=..., flags@entry=...) at /usr/include/c++/9/bits/atomic_base.h:734
#25 0x00007ffff74c0637 in QEventLoop::exec (this=this@entry=0x7fffffffdcd0, flags=flags@entry=...) at ../../include/QtCore/../../../../qt5/qtbase/src/corelib/global/qflags.h:120
#26 0x00007ffff74cb102 in QCoreApplication::exec () at ../../include/QtCore/../../../../qt5/qtbase/src/corelib/global/qflags.h:118
#27 0x00007ffff61a85b6 in QGuiApplication::exec () at /home/mauro/work/qt-git/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:1866
#28 0x00007ffff79c410b in QApplication::exec () at /home/mauro/work/qt-git/qt5/qtbase/src/widgets/kernel/qapplication.cpp:2825
#29 0x0000555555555433 in main (argc=1, argv=0x7fffffffdea8) at main.cpp:14