Qt crashs on Raspberry with Touchscreen
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Hi,
I have a Adafruit 2.8" 320x240 capacitive display running on a raspberry 3, Raspian Jessie. I have a simple test program consisting of one slider, but my program crashs after I touch the screen several times. Here is the trace:
TouchPointPressed without previous release event QQuickEventPoint(accepted:false state:Pressed scenePos:QPointF(167.475,214.104) id:3000002 timeHeld:0) TouchPointPressed without previous release event QQuickEventPoint(accepted:false state:Pressed scenePos:QPointF(229.281,202.154) id:3000002 timeHeld:0) Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x72e90440 (LWP 885)] 0x75e823d0 in QMapDataBase::rebalance(QMapNodeBase*) () from /usr/local/qt5pi/lib/libQt5Core.so.5 (gdb) where #0 0x75e823d0 in QMapDataBase::rebalance(QMapNodeBase*) () from /usr/local/qt5pi/lib/libQt5Core.so.5 #1 0x75e82a28 in QMapDataBase::createNode(int, int, QMapNodeBase*, bool) () from /usr/local/qt5pi/lib/libQt5Core.so.5 #2 0x7682fc48 in QWindowSystemInterfacePrivate::fromNativeTouchPoints(QList<QWindowSystemInterface::TouchPoint> const&, QWindow const*, unsigned char, QEvent::Type*) () from /usr/local/qt5pi/lib/libQt5Gui.so.5 #3 0x7250aaf0 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?)What can I do?
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It's best to post a bug report (including example code) here: https://bugreports.qt.io
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Have you set up any environment variable for Qt? Some like this link
https://doc.qt.io/qt-5/embedded-linux.html#touchFrom an
ls -lin /dev/input and place the output here.
Cleiton Bueno
