The call stack is:
#00 pc 00000000000097a8 /system/lib/libutils.so (android::RefBase::incStrong(void const*) const+4)
#00 pc 0000000000022145 /vendor/lib/libIMGegl.so
#00 pc 000000000000ab79 /vendor/lib/libIMGegl.so (KEGLGetDrawableParameters+252)
#00 pc 0000000000041c53 /vendor/lib/egl/libGLESv2_mtk.so
#00 pc 000000000001663d /vendor/lib/egl/libGLESv2_mtk.so
#00 pc 0000000000016b01 /vendor/lib/egl/libGLESv2_mtk.so (glClear+440)
#00 pc 000000000008acaf /data/app/net.geographx.LinesGame-9_pUex92-tGEqE4iIbRCCw==/lib/arm/libLinesGameQt_armeabi-v7a.so (LinesGame::Squircle::beforeRendering()+270)
#00 pc 000000000017d5b9 /data/app/net.geographx.LinesGame-9_pUex92-tGEqE4iIbRCCw==/lib/arm/libQt5Core_armeabi-v7a.so
#00 pc 0000000000176f4d /data/app/net.geographx.LinesGame-9_pUex92-tGEqE4iIbRCCw==/lib/arm/libQt5Quick_armeabi-v7a.so (QQuickWindowPrivate::renderSceneGraph(QSize const&, QSize const&)+172)
It is a QT bug that is not fixed yet.
Also my app crashes at the destructor of std::thread and this also a QT bug that is not fixed yet.