QSGOpaqueTextureMaterial::compare sometimes segfaults

int QSGOpaqueTextureMaterial::compare(const QSGMaterial *o) const
{
    Q_ASSERT(o && type() == o->type());
    const QSGOpaqueTextureMaterial *other = static_cast<const QSGOpaqueTextureMaterial *>(o);
    if (int diff = m_texture->textureId() - other->texture()->textureId())
        return diff;
    return int(m_filtering) - int(other->m_filtering);
}

#0 0x0000000000000000 in ()
#1 0x00007f963f4a0534 in QSGOpaqueTextureMaterial::compare(QSGMaterial const*) const (this=0x75c11d38, o=0x75c076f8)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/util/qsgtexturematerial.cpp:315
#2 0x00007f963f4887a4 in QSGBatchRenderer::Batch::isMaterialCompatible(QSGBatchRenderer::Element*) const (this=<optimized out>, e=e@entry=0x2da8668) at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:627
#3 0x00007f963f498d91 in QSGBatchRenderer::Renderer::nodeChanged(QSGNode*, QFlags<QSGNode::DirtyStateBit>) (this=0x6f324d40, node=0x75c07530, state=...) at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:1232
#4 0x00007f963f4822e5 in QSGRootNode::notifyNodeChange(QSGNode*, QFlags<QSGNode::DirtyStateBit>) (this=this@entry=0x6f3225c0, node=node@entry=0x75c07530, state=state@entry=...) at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/coreapi/qsgnode.cpp:1285
#5 0x00007f963f482370 in QSGNode::markDirty(QFlags<QSGNode::DirtyStateBit>) (this=this@entry=0x75c07530, bits=..., bits@entry=...)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/coreapi/qsgnode.cpp:678
#6 0x00007f963f4af3d6 in QSGBasicInternalImageNode::setTexture(QSGTexture*) (this=0x75c07530, texture=<optimized out>)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/qsgbasicinternalimagenode.cpp:123
#7 0x00007f963f58391d in QQuickImage::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) (this=<optimized out>, oldNode=<optimized out>)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickimage.cpp:731
#8 0x00007f963f516d07 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) (this=this@entry=0x6f827840, item=item@entry=0x72db2e30)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickwindow.cpp:3120
#9 0x00007f963f517691 in QQuickWindowPrivate::updateDirtyNodes() (this=this@entry=0x6f827840)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickwindow.cpp:2865
#10 0x00007f963f518632 in QQuickWindowPrivate::syncSceneGraph() (this=this@entry=0x6f827840)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickwindow.cpp:420
#11 0x00007f963f4b35e0 in QSGGuiThreadRenderLoop::renderWindow(QQuickWindow*) (this=0x2d917d0, window=0x6f827780)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/scenegraph/qsgrenderloop.cpp:409
#12 0x00007f963f5211d7 in QQuickWindow::event(QEvent*) (this=0x6f827780, e=0x7ffedc699ce0)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickwindow.cpp:1577
#13 0x00007f963e7d9505 in doNotify(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1063
#14 0x000000000042cf12 in Evs::XOne::QmlApplication::notify(QObject*, QEvent*) (this=<optimized out>, object=<optimized out>, event=<optimized out>)
at /home/teamcity/buildAgent/work/769f0b28d43491f7/Client/QmlApplication.cpp:24
#15 0x00007f963e7d95e6 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=receiver@entry=0x6f827780, event=event@entry=0x7ffedc699ce0) at kernel/qcoreapplication.cpp:988
#16 0x00007f963eb26d0e in QWindowPrivate::deliverUpdateRequest() (event=0x7ffedc699ce0, receiver=0x6f827780)
at ../../src/corelib/kernel/qcoreapplication.h:231
#17 0x00007f963eb26d0e in QWindowPrivate::deliverUpdateRequest() (this=<optimized out>) at kernel/qwindow.cpp:2171
#18 0x00007f963eb2717d in QWindow::event(QEvent*) (this=this@entry=0x6f827780, ev=ev@entry=0x7ffedc69a080) at kernel/qwindow.cpp:2142
#19 0x00007f963f521185 in QQuickWindow::event(QEvent*) (this=0x6f827780, e=0x7ffedc69a080)
at /usr/src/debug/qtdeclarative-opensource-src-5.8.0/src/quick/items/qquickwindow.cpp:1596
#20 0x00007f963e7d9505 in doNotify(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1063
#21 0x000000000042cf12 in Evs::XOne::QmlApplication::notify(QObject*, QEvent*) (this=<optimized out>, object=<optimized out>, event=<optimized out>)
at /home/teamcity/buildAgent/work/769f0b28d43491f7/Client/QmlApplication.cpp:24
#22 0x00007f963e7d95e6 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x6f827780, event=event@entry=0x7ffedc69a080)
at kernel/qcoreapplication.cpp:988
#23 0x00007f963e824dae in QTimerInfoList::activateTimers() (event=0x7ffedc69a080, receiver=<optimized out>)
at ../../src/corelib/kernel/qcoreapplication.h:231
#24 0x00007f963e824dae in QTimerInfoList::activateTimers() (this=0x2838e60) at kernel/qtimerinfo_unix.cpp:643
#25 0x00007f963e825599 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
#26 0x00007f963e825599 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:229
#27 0x00007f9634c034c9 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#28 0x00007f9634c03818 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#29 0x00007f9634c038cc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#30 0x00007f963e8259ac in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x2835120, flags=...)
at kernel/qeventdispatcher_glib.cpp:423
#31 0x00007f963e7d829b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffedc69a2d0, flags=..., flags@entry=...)
at kernel/qeventloop.cpp:212
#32 0x00007f963e7dfd44 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1261
#33 0x00007f963eb13cac in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1657
#34 0x000000000042a1a4 in main(int32_t, char**) (argc=4, argv=<optimized out>)
---Type <return> to continue, or q <return> to quit---
at /home/teamcity/buildAgent/work/769f0b28d43491f7/Client/main.cpp:266

        Rectangle {
            id: listviewHeader
            objectName: "listviewHeader"

            anchors.top: parent.top
            anchors.left: filterButtonsZone.right
            anchors.leftMargin: 1
            anchors.right: parent.right

            height: screensProperties.getScaledHeight(52, libraryPage)

            color: Style.evsThemeColors.evs_gray

            clip: true

            property bool showMoreActions: false

            Button {
                id: multipleSelectionButton
                objectName: "multipleSelectionButton"

                visible: false //todo: set to true if deleting multiple medias is supported

                width: screensProperties.getScaledWidth(62, libraryPage)
                height: rootItem.adaptButtonHeightToEvsTheme(listviewHeader.height, libraryPage)

                anchors.verticalCenter: parent.verticalCenter
                anchors.left: parent.left

                flat: true

                Material.foreground: Style.evsThemeColors.evs_gray
                Material.background: Style.evsThemeColors.evs_gray

                onClicked: { mediaLibraryManager.invertMultipleSelectionState(); }

                Label {
                    id: multipleSelectionButtonIcon
                    objectName: "multipleSelectionButtonIcon"

                    anchors.fill: parent

                    elide: Text.ElideRight

                    verticalAlignment: Text.AlignVCenter
                    horizontalAlignment: Text.AlignHCenter

                    text: mediaLibraryManager.multipleSelectionEnabled ? Style.icons.fa_check_square : Style.icons.fa_square_o

                    font.family: "FontAwesome"
                    font.pixelSize: screensProperties.getScaledHeight(14, libraryPage)
                }
            }

            Rectangle {
                id: separator

                visible: multipleSelectionButton.visible

                anchors.top: parent.top
                anchors.bottom: parent.bottom
                anchors.left: multipleSelectionButton.right

                width: screensProperties.getScaledWidth(1, libraryPage)

                color: Style.evsThemeColors.evs_gray_dark
            }

            Item {
                id: moreActionsButtonsRow

                anchors.top: parent.top
                anchors.bottom: parent.bottom

                visible: x < listviewHeader.width - moreActionsButton.width

                width: transitionButton.width + graphicsButton.width + highlightsButton.width + importButton.width + 3*internalProperties.margins

                QtObject {
                    id: internalProperties

                    readonly property real margins: screensProperties.getScaledWidth(1, libraryPage)
                }

                state: "hidden"

                states: [
                    State {
                        name: "hidden"
                        PropertyChanges { target: moreActionsButtonsRow; x: listviewHeader.width - moreActionsButton.width }
                    },
                    State {
                        name: "shown"
                        PropertyChanges { target: moreActionsButtonsRow; x: listviewHeader.width - moreActionsButton.width - moreActionsButtonsRow.width }
                    }
                ]

                transitions: [ Transition { NumberAnimation { properties: "x"; duration: 300; easing.type: Easing.InOutQuad; } } ]

                Button {
                    id: transitionButton
                    objectName: "transitionButton"

                    width: listviewHeader.height
                    height: rootItem.adaptButtonHeightToEvsTheme(listviewHeader.height, libraryPage)

                    anchors.verticalCenter: parent.verticalCenter
                    anchors.right: graphicsButton.left
                    anchors.rightMargin: internalProperties.margins

//                    enabled: listviewHeader.showMoreActions //to avoid clicks during animation

                    flat: true

                    Material.foreground: Style.evsThemeColors.evs_gray_lighter
                    Material.background: Style.evsThemeColors.evs_gray_lighter

                    onClicked: {
                        var desiredFolder = mediaLibraryManager.getUsbLocationPath();
                        if (mediaLibraryManager.doesFolderExist(desiredFolder))
                            fileDialogTransitionSelection.folder = "file://" + desiredFolder;
                        else
                            fileDialogTransitionSelection.folder = fileDialogTransitionSelection.shortcuts.pictures;

                        fileDialogTransitionSelection.open();
                    }

                    Label {
                        id: transitionButtonIcon

                        anchors.fill: parent

                        elide: Text.ElideRight

                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter

                        text: Style.icons.evs_fade_to

                        font.family: "icons-set-evs"
                        font.pixelSize: screensProperties.getScaledHeight(16, libraryPage)
                    }
                }

                Button {
                    id: graphicsButton
                    objectName: "graphicsButton"

                    width: listviewHeader.height
                    height: rootItem.adaptButtonHeightToEvsTheme(listviewHeader.height, libraryPage)

                    anchors.verticalCenter: parent.verticalCenter
                    anchors.right: highlightsButton.left
                    anchors.rightMargin: internalProperties.margins

//                    enabled: listviewHeader.showMoreActions //to avoid clicks during animation

                    flat: true

                    Material.foreground: Style.evsThemeColors.evs_gray_lighter
                    Material.background: Style.evsThemeColors.evs_gray_lighter

                    onClicked: { operationViewQML.isEditingGraphics = true; }

                    Label {
                        id: graphicsButtonIcon

                        anchors.fill: parent

                        elide: Text.ElideRight

                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter

                        text: Style.icons.fa_picture

                        font.family: "FontAwesome"
                        font.pixelSize: screensProperties.getScaledHeight(16, libraryPage)
                    }
                }

                Button {
                    id: highlightsButton
                    objectName: "highlightsButton"

                    width: listviewHeader.height
                    height: rootItem.adaptButtonHeightToEvsTheme(listviewHeader.height, libraryPage)

                    anchors.verticalCenter: parent.verticalCenter
                    anchors.right: importButton.left
                    anchors.rightMargin: internalProperties.margins

//                    enabled: listviewHeader.showMoreActions //to avoid clicks during animation

                    flat: true

                    Material.foreground: Style.evsThemeColors.evs_gray_lighter
                    Material.background: Style.evsThemeColors.evs_gray_lighter

                    onClicked: { mediaLibraryManager.createHighlight(); }

                    Label {
                        id: highlightsButtonIcon

                        anchors.fill: parent

                        elide: Text.ElideRight

                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter

                        text: Style.icons.fa_star

                        font.family: "FontAwesome"
                        font.pixelSize: screensProperties.getScaledHeight(16, libraryPage)
                    }
                }

                Button {
                    id: importButton
                    objectName: "importButton"

                    width: listviewHeader.height
                    height: rootItem.adaptButtonHeightToEvsTheme(listviewHeader.height, libraryPage)

                    anchors.verticalCenter: parent.verticalCenter
                    anchors.right: parent.right

//                    enabled: listviewHeader.showMoreActions //to avoid clicks during animation

                    flat: true

                    Material.foreground: Style.evsThemeColors.evs_gray_lighter
                    Material.background: Style.evsThemeColors.evs_gray_lighter

                    onClicked: {
                        var desiredFolder = mediaLibraryManager.getUsbLocationPath();
                        if (mediaLibraryManager.doesFolderExist(desiredFolder))
                            fileDialogClipSelection.folder = "file://" + desiredFolder;
                        else
                            fileDialogClipSelection.folder = fileDialogClipSelection.shortcuts.movies;

                        fileDialogClipSelection.open();
                    }

                    Label {
                        id: importButtonIcon

                        anchors.fill: parent

                        elide: Text.ElideRight

                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter

                        text: Style.icons.fa_sign_in

                        font.family: "FontAwesome"
                        font.pixelSize: screensProperties.getScaledHeight(16, libraryPage)
                    }
                }
            }

            Button {
                id: moreActionsButton
                objectName: "moreActionsButton"

                width: parent.height
                height: rootItem.adaptButtonHeightToEvsTheme(parent.height, moreActionsButton)

                anchors.verticalCenter: parent.verticalCenter
                anchors.right: parent.right

                flat: true

                Material.foreground: "#455a64"
                Material.background: "#455a64"

                onClicked: {
---------> dump here when clicked <--------------------------------
//  listviewHeader.showMoreActions = !listviewHeader.showMoreActions;

                }

                Label {
                    id: moreActionsButtonIcon

                    anchors.fill: parent

                    elide: Text.ElideRight

                    verticalAlignment: Text.AlignVCenter
                    horizontalAlignment: Text.AlignHCenter

//                    text: listviewHeader.showMoreActions ? Style.icons.fa_times : Style.icons.fa_plus

                    font.family: "FontAwesome"
                    font.pixelSize: screensProperties.getScaledHeight(24, libraryPage)
                }
            }
        }