QGIS » QGIS Application

This was uncovered by the (amazing) composer map item preview rendering upgrade.

It appears that when a single SVG picture (possibly cached?) is rendered concurrently, QGIS either crashes or a thread is stuck and the app can't exit properly. On the thread frozen front, it translates into a composer map item stuck in "rendering map..." mode.

1. Open the attached test project
2. Open the "Composer 01" composer
3. Notice either a QGIS crash, or one of the two map items stuck in "rendering map..."
4. If a crash doesn't occur on first try, just re-launch QGIS and re-do the steps a couple of times, you'll hit the crash

GDB where

(gdb) where
#0  0x00007f75f08344aa in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#1  0x00007f75f083d68e in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#2  0x00007f75f080be0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#3  0x00007f75f0814556 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#4  0x00007f75f087b055 in QRasterPaintEngine::stroke(QVectorPath const&, QPen const&) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#5  0x00007f75f088e70f in QPainter::strokePath(QPainterPath const&, QPen const&) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#6  0x00007f75f088e88f in QPainter::drawArc(QRectF const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007f75f0689d69 in QPicture::exec(QPainter*, QDataStream&, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f75f068bce9 in QPicture::play(QPainter*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f75f08953b2 in QPainter::drawPicture(QPointF const&, QPicture const&) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f75f1881d85 in QPainter::drawPicture(QPoint const&, QPicture const&) (this=0x10327a0d0, pt=..., p=...) at /usr/include/x86_64-linux-gnu/qt5/QtGui/qpainter.h:928
#11 0x00007f75f1881d20 in QPainter::drawPicture(int, int, QPicture const&) (this=0x10327a0d0, x=0, y=0, p=...) at /usr/include/x86_64-linux-gnu/qt5/QtGui/qpainter.h:923
#12 0x00007f75f18775ee in QgsSvgMarkerSymbolLayer::renderPoint(QPointF, QgsSymbolRenderContext&) (this=0x10341c5f0, point=..., context=...)
    at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgsmarkersymbollayer.cpp:2007
#13 0x00007f75f18fde76 in QgsMarkerSymbol::renderPointUsingLayer(QgsMarkerSymbolLayer*, QPointF, QgsSymbolRenderContext&) (this=0x10341c760, layer=0x10341c5f0, point=..., context=...) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgssymbol.cpp:1443
#14 0x00007f75f18fe219 in QgsMarkerSymbol::renderPoint(QPointF, QgsFeature const*, QgsRenderContext&, int, bool) (this=0x10341c760, point=..., f=
    0x7f7514004d90, context=..., layerIdx=-1, selected=false) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgssymbol.cpp:1477
#15 0x00007f75f1825694 in QgsCentroidFillSymbolLayer::renderPolygon(QPolygonF const&, QList<QPolygonF>*, QgsSymbolRenderContext&) (this=0x10341b900, points=..., rings=0x0, context=...) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgsfillsymbollayer.cpp:3479
#16 0x00007f75f1900879 in QgsFillSymbol::renderPolygonUsingLayer(QgsSymbolLayer*, QPolygonF const&, QList<QPolygonF>*, QgsSymbolRenderContext&) (this=0x103357770, layer=0x10341b900, points=..., rings=0x0, context=...) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgssymbol.cpp:1801
#17 0x00007f75f19002ae in QgsFillSymbol::renderPolygon(QPolygonF const&, QList<QPolygonF>*, QgsFeature const*, QgsRenderContext&, int, bool) (this=0x103357770, points=..., rings=0x0, f=0x7f7514004d90, context=..., layerIdx=0, selected=false) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgssymbol.cpp:1752
#18 0x00007f75f18fa7c0 in QgsSymbol::renderFeature(QgsFeature const&, QgsRenderContext&, int, bool, bool, int, int) (this=0x103357770, feature=..., context=..., layer=0, selected=false, drawVertexMarker=false, currentVertexMarkerType=1, currentVertexMarkerSize=3) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgssymbol.cpp:918
#19 0x00007f75f18905aa in QgsFeatureRenderer::renderFeatureWithSymbol(QgsFeature&, QgsSymbol*, QgsRenderContext&, int, bool, bool) (this=0x102fc0450, feature=..., symbol=0x103357770, context=..., layer=0, selected=false, drawVertexMarker=false) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgsrenderer.cpp:110
#20 0x00007f75f1890540 in QgsFeatureRenderer::renderFeature(QgsFeature&, QgsRenderContext&, int, bool, bool) (this=0x102fc0450, feature=..., context=..., layer=0, selected=false, drawVertexMarker=false) at /home/webmaster/dev/cpp/QGIS/src/core/symbology/qgsrenderer.cpp:104
#21 0x00007f75f1df206c in QgsVectorLayerRenderer::drawRendererLevels(QgsFeatureIterator&) (this=0x103418160, fit=...)
    at /home/webmaster/dev/cpp/QGIS/src/core/qgsvectorlayerrenderer.cpp:453
#22 0x00007f75f1df096c in QgsVectorLayerRenderer::render() (this=0x103418160) at /home/webmaster/dev/cpp/QGIS/src/core/qgsvectorlayerrenderer.cpp:248
#23 0x00007f75f1bee5ae in QgsMapRendererCustomPainterJob::doRender() (this=0x10341a890) at /home/webmaster/dev/cpp/QGIS/src/core/qgsmaprenderercustompainterjob.cpp:265
#24 0x00007f75f1bee1ee in QgsMapRendererCustomPainterJob::staticRender(QgsMapRendererCustomPainterJob*) (self=0x10341a890)
    at /home/webmaster/dev/cpp/QGIS/src/core/qgsmaprenderercustompainterjob.cpp:216
#25 0x00007f75f1bf0f89 in QtConcurrent::StoredFunctorCall1<void, void (*)(QgsMapRendererCustomPainterJob*), QgsMapRendererCustomPainterJob*>::runFunctor() (this=0x1033dd660)
    at /usr/include/x86_64-linux-gnu/qt5/QtConcurrent/qtconcurrentstoredfunctioncall.h:432
#26 0x00007f75f1bef69b in QtConcurrent::RunFunctionTask<void>::run() (this=0x1033dd660) at /usr/include/x86_64-linux-gnu/qt5/QtConcurrent/qtconcurrentrunbase.h:136
#27 0x00007f75efe74581 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f75efe7829d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f75e79e274a in start_thread (arg=0x7f752a09b700) at pthread_create.c:456