QPainter::begin: A paint device can only be painted by one painter at a time.
QPainter::translate: Painter not active
QPainter::worldTransform: Painter not active


Thread 1 (Thread 0x7ffff7fbd740 (LWP 4956)):
#0  0x00007ffff7736e0c in QPaintDevice::devicePixelRatio (this=0x0) at ../../include/QtGui/../../src/gui/painting/qpaintdevice.h:86
No locals.
#1  0x00007ffff7722f63 in QWidgetEffectSourcePrivate::pixmap (this=0x676b70, system=Qt::DeviceCoordinates, offset=0x676be8, mode=QGraphicsEffect::PadToEffectiveBoundingRect) at kernel/qwidget.cpp:5906
        deviceCoordinates = true
        __PRETTY_FUNCTION__ = "virtual QPixmap QWidgetEffectSourcePrivate::pixmap(Qt::CoordinateSystem, QPoint*, QGraphicsEffect::PixmapPadMode) const"
        pixmapOffset = {xp = 0, yp = 0}
        sourceRect = {xp = 0, yp = 0, w = 100, h = 30}
        effectRect = {x1 = 0, y1 = 0, x2 = 108, y2 = 38}
        dpr = 6.95334755701688e-310
        pixmap = {<QPaintDevice> = {_vptr.QPaintDevice = 0x0, painters = 0, reserved = 0x405b400000000000}, data = {d = 0x4043800000000000}}
#2  0x00007ffff7ba3bfd in QGraphicsEffectSource::pixmap (this=0x676c70, system=Qt::DeviceCoordinates, offset=0x7fffffffc220, mode=QGraphicsEffect::PadToEffectiveBoundingRect) at effects/qgraphicseffect.cpp:336
        d = 0x676b70
        item = 0x0
        __PRETTY_FUNCTION__ = "QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem, QPoint*, QGraphicsEffect::PixmapPadMode) const"
        pm = {<QPaintDevice> = {_vptr.QPaintDevice = 0x7ffff65737c8 <vtable for QPixmap+16>, painters = 0, reserved = 0x0}, data = {d = 0x0}}
#3  0x00007ffff7ba3d3e in QGraphicsEffect::sourcePixmap (this=0x6768b0, system=Qt::DeviceCoordinates, offset=0x7fffffffc220, mode=QGraphicsEffect::PadToEffectiveBoundingRect) at effects/qgraphicseffect.cpp:371
        d = 0x6768d0
#4  0x00007ffff7ba5210 in QGraphicsDropShadowEffect::draw (this=0x6768b0, painter=0x7fffffffc3d0) at effects/qgraphicseffect.cpp:1063
        d = 0x6768d0
        mode = QGraphicsEffect::PadToEffectiveBoundingRect
        offset = {xp = 0, yp = 0}
        pixmap = {<QPaintDevice> = {_vptr.QPaintDevice = 0x0, painters = 27124, reserved = 0x7fffffffc2f0}, data = {d = 0x7fffffffc3d0}}
        restoreTransform = {affine = {_m11 = 2.3341953705113993e-312, _m12 = 0, _m21 = 0, _m22 = 3.4164362733160527e-317, _dx = 6.786142539507929e-311, _dy = 6.953347738093619e-310}, m_13 = 6.9533477384402554e-310, m_23 = 6.9533477248436183e-310, m_33 = 0, m_type = 0, m_dirty = 16, d = 0x7fffffffc310}
#5  0x00007ffff7721183 in QWidgetPrivate::drawWidget (this=0x6765c0, pdev=0x697300, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x682df0) at kernel/qwidget.cpp:5511
        p = {static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff64722c0 <qt_meta_stringdata_QPainter>, data = 0x7ffff6472440 <qt_meta_data_QPainter>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x698380}}
        context = {pdev = 0x697300, rgn = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}, offset = {xp = 0, yp = 0}, flags = 4, sharedPainter = 0x0, backingStore = 0x682df0, painter = 0x7fffffffc3d0}
        source = 0x676c70
        sourced = 0x676b70
        asRoot = false
        onScreen = false
        q = 0x676580
        alsoOnScreen = false
        recursive = false
        alsoInvisible = false
        toBePainted = {d = 0x4059000000000000, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        __PRETTY_FUNCTION__ = "void QWidgetPrivate::drawWidget(QPaintDevice*, const QRegion&, const QPoint&, int, QPainter*, QWidgetBackingStore*)"
#6  0x00007ffff772295f in QWidgetPrivate::paintSiblingsRecursive (this=0x6753c0, pdev=0x697300, siblings=..., index=0, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x682df0) at kernel/qwidget.cpp:5835
        wRegion = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        w = 0x676580
        boundingRect = {x1 = 0, y1 = 0, x2 = 99, y2 = 32}
        dirtyBoundingRect = false
        exludeOpaqueChildren = false
        excludeNativeChildren = false
        wd = 0x6765c0
        widgetPos = {xp = 0, yp = 0}
        hasMask = false
#7  0x00007ffff7721f2f in QWidgetPrivate::drawWidget (this=0x6753c0, pdev=0x697300, rgn=..., offset=..., flags=5, sharedPainter=0x0, backingStore=0x682df0) at kernel/qwidget.cpp:5692
        asRoot = true
        onScreen = false
        q = 0x675360
        alsoOnScreen = false
        recursive = true
        alsoInvisible = false
        toBePainted = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        __PRETTY_FUNCTION__ = "void QWidgetPrivate::drawWidget(QPaintDevice*, const QRegion&, const QPoint&, int, QPainter*, QWidgetBackingStore*)"
#8  0x00007ffff7722c72 in QWidgetEffectSourcePrivate::draw (this=0x676a50, painter=0x7fffffffca60) at kernel/qwidget.cpp:5870
        toBePainted = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        wd = 0x6753c0
#9  0x00007ffff7ba38d5 in QGraphicsEffectSource::draw (this=0x676b50, painter=0x7fffffffca60) at effects/qgraphicseffect.cpp:237
        d = 0x676a50
        pm = {<QPaintDevice> = {_vptr.QPaintDevice = 0x7ffff65737c8 <vtable for QPixmap+16>, painters = 0, reserved = 0x0}, data = {d = 0x0}}
#10 0x00007ffff7ba3940 in QGraphicsEffect::drawSource (this=0x6767d0, painter=0x7fffffffca60) at effects/qgraphicseffect.cpp:256
        d = 0x6767f0
#11 0x00007ffff7ba5731 in QGraphicsOpacityEffect::draw (this=0x6767d0, painter=0x7fffffffca60) at effects/qgraphicseffect.cpp:1200
        d = 0x6767f0
        offset = {xp = 0, yp = 0}
        system = Qt::DeviceCoordinates
        pixmap = {<QPaintDevice> = {_vptr.QPaintDevice = 0x0, painters = 0, reserved = 0x7fffffffc980}, data = {d = 0x7fffffffca60}}
#12 0x00007ffff7721183 in QWidgetPrivate::drawWidget (this=0x6753c0, pdev=0x697300, rgn=..., offset=..., flags=5, sharedPainter=0x0, backingStore=0x682df0) at kernel/qwidget.cpp:5511
        p = {static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff64722c0 <qt_meta_stringdata_QPainter>, data = 0x7ffff6472440 <qt_meta_data_QPainter>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x697d00}}
        context = {pdev = 0x697300, rgn = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}, offset = {xp = 0, yp = 0}, flags = 5, sharedPainter = 0x0, backingStore = 0x682df0, painter = 0x7fffffffca60}
        source = 0x676b50
        sourced = 0x676a50
        asRoot = true
        onScreen = false
        q = 0x675360
        alsoOnScreen = false
        recursive = true
        alsoInvisible = false
        toBePainted = {d = 0x505f4853554c465f, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        __PRETTY_FUNCTION__ = "void QWidgetPrivate::drawWidget(QPaintDevice*, const QRegion&, const QPoint&, int, QPainter*, QWidgetBackingStore*)"
#13 0x00007ffff76e593f in QWidgetBackingStore::doSync (this=0x682df0) at kernel/qwidgetbackingstore.cpp:1389
        flags = 5
        updatesDisabled = false
        repaintAllWidgets = true
        inTopLevelResize = false
        tlwRect = {x1 = 0, y1 = 29, x2 = 99, y2 = 61}
        surfaceGeometry = {x1 = 0, y1 = 29, x2 = -2, y2 = 27}
        toClean = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
        opaqueNonOverlappedWidgets = {a = 32, s = 0, ptr = 0x7fffffffcd90, {array = "\000\000\000\000\000\000\000\000\260\374V\366\377\177\000\000\300\315\377\377\377\177\000\000\316\242\377\365\377\177\000\000\340\315\377\377\377\177\000\000\260\374V\366\377\177\000\000\360\315\377\377\377\177\000\000p\212\377\365\377\177\000\000\001\000\000\000\377\177\000\000\260\374V\366\377\177\000\000\310\324\377\377\377\177\000\000hSg\000\000\000\000\000\020\316\377\377\377\177\000\000#em\367\377\177\000\000\310\324\377\377\377\177\000\000hSg\000\000\000\000\000\060\316\377\377\377\177\000\000\252tm\367\377\177\000\000\310\324\377\377\377\177\000\000\030mg\000\000\000\000\000\260\316\377\377\377\177\000\000J@n\367\377\177\000\000\000\317\377\377\377\177\000\000\360-h\000\000\000\000\000\310\324\377\377\377\177\000\000\360-h\000\000\000\000\000\220lg\000\000\000\000\000hSg\000\000\000\000\000\220\316\377\377\377\177\000\000#em\367\377\177\000\000\001\000\000\000\n\000\000\000\020.h\000\000\000\000", q_for_alignment_1 = 0, q_for_alignment_2 = 0}}
        tlwExtra = 0x676c90
        beginPaintInfo = {wasFlushed = 0, nothingToPaint = 0, backingStoreRecreated = 0}
        dirtyCopy = {d = 0x6767b0, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}
#14 0x00007ffff76e43f1 in QWidgetBackingStore::sync (this=0x682df0, exposedWidget=0x675360, exposedRegion=...) at kernel/qwidgetbackingstore.cpp:1144
        tlwExtra = 0x676c90
#15 0x00007ffff7717aca in QWidgetPrivate::syncBackingStore (this=0x6753c0, region=...) at kernel/qwidget.cpp:1971
        bs = 0x682df0
#16 0x00007ffff775c3ab in QWidgetWindow::handleExposeEvent (this=0x676d30, event=0x7fffffffd4b0) at kernel/qwidgetwindow.cpp:921
        wPriv = 0x6753c0
        exposed = true
#17 0x00007ffff7759409 in QWidgetWindow::event (this=0x676d30, event=0x7fffffffd4b0) at kernel/qwidgetwindow.cpp:284
No locals.
#18 0x00007ffff76d3da2 in QApplicationPrivate::notify_helper (this=0x61a880, receiver=0x676d30, e=0x7fffffffd4b0) at kernel/qapplication.cpp:3745
        consumed = false
#19 0x00007ffff76d100e in QApplication::notify (this=0x7fffffffd900, receiver=0x676d30, e=0x7fffffffd4b0) at kernel/qapplication.cpp:3105
        d = 0x61a880
        __PRETTY_FUNCTION__ = "virtual bool QApplication::notify(QObject*, QEvent*)"
        res = false
#20 0x00007ffff720a40f in QCoreApplication::notifyInternal2 (receiver=0x676d30, event=0x7fffffffd4b0) at kernel/qcoreapplication.cpp:975
        selfRequired = true
        result = false
        cbdata = {0x676d30, 0x7fffffffd4b0, 0x7fffffffd3de}
        d = 0x676d90
        threadData = 0x61a9f0
        scopeLevelCounter = {threadData = 0x61a9f0}
#21 0x00007ffff602c22e in QCoreApplication::sendSpontaneousEvent (receiver=0x676d30, event=0x7fffffffd4b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
No locals.
#22 0x00007ffff602895e in QGuiApplicationPrivate::processExposeEvent (e=0x68de80) at kernel/qguiapplication.cpp:2828
        window = 0x676d30
        p = 0x676d90
        exposeEvent = {<QEvent> = {_vptr.QEvent = 0x7ffff65727e8 <vtable for QExposeEvent+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff74396e0 <qt_meta_stringdata_QEvent>, data = 0x7ffff743b140 <qt_meta_data_QEvent>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 206, posted = 0, spont = 1, m_accept = 1, reserved = 0}, rgn = {d = 0x68db10, static shared_empty = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, <No data fields>}}}, qt_rgn = 0x7ffff6586e00 <qrp>}}}
#23 0x00007ffff6023a48 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x68de80) at kernel/qguiapplication.cpp:1777
        __PRETTY_FUNCTION__ = "static void QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)"
#24 0x00007ffff6003875 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:710
        event = 0x68de80
        nevents = 4
#25 0x00007ffff7f10a9a in userEventSourceDispatch (source=0x6679e0) at qeventdispatcher_glib.cpp:76
        userEventSource = 0x6679e0
        dispatcher = 0x66e1f0
#26 0x00007ffff4671197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#27 0x00007ffff46713f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#28 0x00007ffff467149c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#29 0x00007ffff72926e8 in QEventDispatcherGlib::processEvents (this=0x66e1f0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0x6684d0
        canWait = true
        savedFlags = {i = 0}
        result = false
#30 0x00007ffff7f10cca in QPAEventDispatcherGlib::processEvents (this=0x66e1f0, flags=...) at qeventdispatcher_glib.cpp:121
No locals.
#31 0x00007ffff7206a88 in QEventLoop::processEvents (this=0x7fffffffd850, flags=...) at kernel/qeventloop.cpp:134
        d = 0x695460
#32 0x00007ffff7206dbf in QEventLoop::exec (this=0x7fffffffd850, flags=...) at kernel/qeventloop.cpp:212
        d = 0x695460
        locker = {val = 6400736}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x695460, locker = @0x7fffffffd7d0, exceptionCaught = true}
        app = 0x7fffffffd900
#33 0x00007ffff720ac05 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1248
        threadData = 0x61a9f0
        __PRETTY_FUNCTION__ = "static int QCoreApplication::exec()"
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff753e2a0 <vtable for QEventLoop+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff73cf580 <qt_meta_stringdata_QObject>, data = 0x7ffff73cf6a0 <qt_meta_data_QObject>, static_metacall = 0x7ffff7252f98 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x695460}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff741e020 <qt_meta_stringdata_Qt>, data = 0x7ffff7429100 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff75355c0 <QObject::staticMetaObject>, stringdata = 0x7ffff7439220 <qt_meta_stringdata_QEventLoop>, data = 0x7ffff7439280 <qt_meta_data_QEventLoop>, static_metacall = 0x7ffff72fb8d4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 0
#34 0x00007ffff6023716 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1661
No locals.
#35 0x00007ffff76d09b5 in QApplication::exec () at kernel/qapplication.cpp:2921
No locals.
#36 0x0000000000400dd3 in main (argc=1, argv=0x7fffffffda18) at ../qtbug60231/main.cpp:18
        app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x7ffff7da6980 <vtable for QApplication+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff73cf580 <qt_meta_stringdata_QObject>, data = 0x7ffff73cf6a0 <qt_meta_data_QObject>, static_metacall = 0x7ffff7252f98 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x61a880}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff741e020 <qt_meta_stringdata_Qt>, data = 0x7ffff7429100 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff75355c0 <QObject::staticMetaObject>, stringdata = 0x7ffff7439320 <qt_meta_stringdata_QCoreApplication>, data = 0x7ffff7439540 <qt_meta_data_QCoreApplication>, static_metacall = 0x7ffff72fba2e <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0x7fffffffd900}, static staticMetaObject = {d = {superdata = 0x7ffff753e320 <QCoreApplication::staticMetaObject>, stringdata = 0x7ffff64019c0 <qt_meta_stringdata_QGuiApplication>, data = 0x7ffff6401f60 <qt_meta_data_QGuiApplication>, static_metacall = 0x7ffff602ab64 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff6571fc0 <QGuiApplication::staticMetaObject>, stringdata = 0x7ffff7bb0880 <qt_meta_stringdata_QApplication>, data = 0x7ffff7bb0ba0 <qt_meta_data_QApplication>, static_metacall = 0x7ffff76d5f18 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        w1 = 0x675360
        w2 = 0x676580
        e1 = 0x6767d0
        e2 = 0x6768b0