QGIS » QGIS Application

If I add a WMS layer on my machine, it crashes on the following assertion failure:

Fatal: ASSERT: "sInstance == 0" in file /home/martin/qgis/git-master/src/core/qgssingleton.h, line 43

Sample code to be pasted in python console to replicate the problem:

l = QgsRasterLayer("crs=EPSG:3857&dpiMode=all&format=image/png&layers=Baker&styles=&url=http://wms.lizardtech.com/lizardtech/iserv/ows", "x", "wms")
QgsMapLayerRegistry.instance().addMapLayer(l)

Backtrace:

#0  0x00007fffefa5ebb9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007fffefa61fc8 in __GI_abort () at abort.c:89
#2  0x00000000005759b7 in qgisCrash (signal=-1) at /home/martin/qgis/git-master/src/app/main.cpp:306
#3  0x0000000000575b7a in myMessageOutput (type=QtFatalMsg, msg=0x7fff581b06d8 "ASSERT: \\"sInstance == 0\\" in file /home/martin/qgis/git-master/src/core/qgssingleton.h, line 43")
    at /home/martin/qgis/git-master/src/app/main.cpp:359
#4  0x00007ffff2aedbb1 in qt_message_output (msgType=msgType@entry=QtFatalMsg, 
    buf=0x7fff581b06d8 "ASSERT: \\"sInstance == 0\\" in file /home/martin/qgis/git-master/src/core/qgssingleton.h, line 43") at global/qglobal.cpp:2308
#5  0x00007ffff2aedff9 in qt_message(QtMsgType, const char *, typedef __va_list_tag __va_list_tag *) (msgType=msgType@entry=QtFatalMsg, 
    msg=0x7ffff2c5ba20 "ASSERT: \\"%s\\" in file %s, line %d", ap=ap@entry=0x7fff63ffccf8) at global/qglobal.cpp:2429
#6  0x00007ffff2aee804 in qFatal (msg=<optimized out>) at global/qglobal.cpp:2612
#7  0x00007ffff4180dc9 in QgsSingleton<QgsNetworkAccessManager>::QgsSingleton (this=0x7fff5800b190) at /home/martin/qgis/git-master/src/core/qgssingleton.h:43
#8  0x00007ffff417d784 in QgsNetworkAccessManager::QgsNetworkAccessManager (this=0x7fff5800b180, parent=0x0) at /home/martin/qgis/git-master/src/core/qgsnetworkaccessmanager.cpp:91
#9  0x00007fff809700ed in QgsWmsImageDownloadHandler::QgsWmsImageDownloadHandler (this=0x7fff63ffdd50, providerUri=..., url=..., auth=..., image=0x7fff580ddb80)
    at /home/martin/qgis/git-master/src/providers/wms/qgswmsprovider.cpp:3165
#10 0x00007fff8095064f in QgsWmsProvider::draw (this=0x18f7d90, viewExtent=..., pixelWidth=785, pixelHeight=274) at /home/martin/qgis/git-master/src/providers/wms/qgswmsprovider.cpp:558
#11 0x00007fff809560b7 in QgsWmsProvider::readBlock (this=0x18f7d90, bandNo=1, viewExtent=..., pixelWidth=785, pixelHeight=274, block=0x7fff5800b670)
    at /home/martin/qgis/git-master/src/providers/wms/qgswmsprovider.cpp:846
#12 0x00007ffff436d2ba in QgsRasterDataProvider::block (this=0x18f7d90, theBandNo=1, theExtent=..., theWidth=785, theHeight=274)
    at /home/martin/qgis/git-master/src/core/raster/qgsrasterdataprovider.cpp:208
#13 0x00007ffff43b4518 in QgsSingleBandColorDataRenderer::block (this=0x103ef70, bandNo=1, extent=..., width=785, height=274)
    at /home/martin/qgis/git-master/src/core/raster/qgssinglebandcolordatarenderer.cpp:67
#14 0x00007ffff43b79a5 in QgsBrightnessContrastFilter::block (this=0x198f730, bandNo=1, extent=..., width=785, height=274)
    at /home/martin/qgis/git-master/src/core/raster/qgsbrightnesscontrastfilter.cpp:125
#15 0x00007ffff43b8c41 in QgsHueSaturationFilter::block (this=0x131cf00, bandNo=1, extent=..., width=785, height=274)
    at /home/martin/qgis/git-master/src/core/raster/qgshuesaturationfilter.cpp:131
#16 0x00007ffff43a7073 in QgsRasterResampleFilter::block (this=0x12373b0, bandNo=1, extent=..., width=785, height=274)
    at /home/martin/qgis/git-master/src/core/raster/qgsrasterresamplefilter.cpp:170
#17 0x00007ffff43769c4 in QgsRasterProjector::block (this=0x122d9c0, bandNo=1, extent=..., width=785, height=274) at /home/martin/qgis/git-master/src/core/raster/qgsrasterprojector.cpp:780
#18 0x00007ffff4383fc3 in QgsRasterIterator::readNextRasterPart (this=0x7fff63ffead0, bandNumber=1, nCols=@0x7fff63ffe9bc: 785, nRows=@0x7fff63ffe9c0: 274, block=0x7fff63ffe9f0, 
    topLeftCol=@0x7fff63ffe9c4: 0, topLeftRow=@0x7fff63ffe9c8: 0) at /home/martin/qgis/git-master/src/core/raster/qgsrasteriterator.cpp:96
#19 0x00007ffff439cbdb in QgsRasterDrawer::draw (this=0x7fff63ffeaa0, p=0x1fdb4d0, viewPort=0x4877450, theQgsMapToPixel=0x182cee0)
    at /home/martin/qgis/git-master/src/core/raster/qgsrasterdrawer.cpp:59
#20 0x00007ffff4392c82 in QgsRasterLayerRenderer::render (this=0x14814e0) at /home/martin/qgis/git-master/src/core/raster/qgsrasterlayerrenderer.cpp:199
#21 0x00007ffff4171b36 in QgsMapRendererParallelJob::renderLayerStatic (job=...) at /home/martin/qgis/git-master/src/core/qgsmaprendererparalleljob.cpp:215
#22 0x00007ffff41731ec in QtConcurrent::FunctionWrapper1<void, LayerRenderJob&>::operator() (this=0x11b5a38, u=...) at /usr/include/qt4/QtCore/qtconcurrentfunctionwrappers.h:86
#23 0x00007ffff4172f54 in QtConcurrent::MapKernel<QList<LayerRenderJob>::iterator, QtConcurrent::FunctionWrapper1<void, LayerRenderJob&> >::runIteration (this=0x11b5a00, it=...)
    at /usr/include/qt4/QtCore/qtconcurrentmapkernel.h:73
#24 0x00007ffff4172fd9 in QtConcurrent::MapKernel<QList<LayerRenderJob>::iterator, QtConcurrent::FunctionWrapper1<void, LayerRenderJob&> >::runIterations (this=0x11b5a00, 
    sequenceBeginIterator=..., beginIndex=0, endIndex=1) at /usr/include/qt4/QtCore/qtconcurrentmapkernel.h:82
#25 0x00007ffff417344b in QtConcurrent::IterateKernel<QList<LayerRenderJob>::iterator, void>::forThreadFunction (this=0x11b5a00) at /usr/include/qt4/QtCore/qtconcurrentiteratekernel.h:263
#26 0x00007ffff4173156 in QtConcurrent::IterateKernel<QList<LayerRenderJob>::iterator, void>::threadFunction (this=0x11b5a00) at /usr/include/qt4/QtCore/qtconcurrentiteratekernel.h:225
#27 0x00007ffff2aea005 in QtConcurrent::ThreadEngineBase::run (this=0x11b5a40) at concurrent/qtconcurrentthreadengine.cpp:264
#28 0x00007ffff2aebfee in QThreadPoolThread::run (this=0x7fff6400b180) at concurrent/qthreadpool.cpp:108
#29 0x00007ffff2af832f in QThreadPrivate::start (arg=0x7fff6400b180) at thread/qthread_unix.cpp:349
#30 0x00007fffeceb9182 in start_thread (arg=0x7fff63fff700) at pthread_create.c:312
#31 0x00007fffefb22fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111