QGIS » QGIS Application

Valgrind output doesn't give anything more:

src/core/qgscoordinatereferencesystem.cpp: 992: (setMapUnits) Projection has linear units of metre
src/core/qgsdistancearea.cpp: 212: (setEllipsoid) setEllipsoid: a=6.37814e+06, b=6.35675e+06, 1/f=298.257
src/core/qgscoordinatereferencesystem.cpp: 522: (createFromProj4) proj4: +proj=longlat +ellps=WGS84 +no_defs
src/core/qgscoordinatereferencesystem.cpp: 552: (createFromProj4) proj string supplied has no +a argument
src/core/qgscoordinatereferencesystem.cpp: 719: (getRecord) running query: select * from tbl_srs where parameters='+proj=longlat +ellps=WGS84 +no_defs' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 740: (getRecord) trying system srs.db
src/core/qgscoordinatereferencesystem.cpp: 751: (getRecord) Multiple records found in srs.db
src/core/qgscoordinatereferencesystem.cpp: 762: (getRecord) trying user qgis.db
src/core/qgscoordinatereferencesystem.cpp: 803: (getRecord) failed :  select * from tbl_srs where parameters='+proj=longlat +ellps=WGS84 +no_defs' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 810: (getRecord) retrieved:  select * from tbl_srs where parameters='+proj=longlat +ellps=WGS84 +no_defs' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 719: (getRecord) running query: SELECT * FROM tbl_srs WHERE ' '||parameters||' ' LIKE '% +proj=longlat %' AND ' '||parameters||' ' LIKE '% +ellps=WGS84 %' AND ' '||parameters||' ' LIKE '% +no_defs %' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 740: (getRecord) trying system srs.db
src/core/qgscoordinatereferencesystem.cpp: 751: (getRecord) Multiple records found in srs.db
src/core/qgscoordinatereferencesystem.cpp: 762: (getRecord) trying user qgis.db
src/core/qgscoordinatereferencesystem.cpp: 803: (getRecord) failed :  SELECT * FROM tbl_srs WHERE ' '||parameters||' ' LIKE '% +proj=longlat %' AND ' '||parameters||' ' LIKE '% +ellps=WGS84 %' AND ' '||parameters||' ' LIKE '% +no_defs %' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 810: (getRecord) retrieved:  SELECT * FROM tbl_srs WHERE ' '||parameters||' ' LIKE '% +proj=longlat %' AND ' '||parameters||' ' LIKE '% +ellps=WGS84 %' AND ' '||parameters||' ' LIKE '% +no_defs %' order by deprecated
src/core/qgscoordinatereferencesystem.cpp: 682: (createFromProj4) globbing search for srsid from this proj string
src/core/qgscoordinatereferencesystem.cpp: 1030: (findMatchingProj) entered.
src/core/qgscoordinatereferencesystem.cpp: 1072: (findMatchingProj) -------> MATCH FOUND in srs.db srsid: 3239
src/core/qgscoordinatereferencesystem.cpp: 685: (createFromProj4) globbing search for srsid returned srsid: 3239
==19228== Invalid read of size 8
==19228==    at 0x7F023BA: QgsComposerScaleBar::update() (qgscomposerscalebar.cpp:410)
==19228==    by 0x7AD895: QgsComposerScaleBarWidget::on_mMapComboBox_activated(QString const&) (qgscomposerscalebarwidget.cpp:173)
==19228==    by 0x7ADCD6: QgsComposerScaleBarWidget::refreshMapComboBox() (qgscomposerscalebarwidget.cpp:117)
==19228==    by 0x7ADE00: QgsComposerScaleBarWidget::showEvent(QShowEvent*) (qgscomposerscalebarwidget.cpp:128)
==19228==    by 0x96207E4: QWidget::event(QEvent*) (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==    by 0x95D166B: QApplicationPrivate::notify_helper(QObject*, QEvent*) (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==    by 0x95D7BEF: QApplication::notify(QObject*, QEvent*) (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==    by 0x7CA1B1A: QgsApplication::notify(QObject*, QEvent*) (qgsapplication.cpp:243)
==19228==    by 0x90A404C: QCoreApplication::notifyInternal(QObject*, QEvent*) (in /usr/lib64/qt4/libQtCore.so.4.8.5)
==19228==    by 0x961DF4E: QWidgetPrivate::show_helper() (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==    by 0x961FBF3: QWidget::setVisible(bool) (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==    by 0x998B642: QDockWidgetLayout::setWidgetForRole(QDockWidgetLayout::Role, QWidget*) (in /usr/lib64/qt4/libQtGui.so.4.8.5)
==19228==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==19228== 
QGIS died on signal 11[Current thread is 1 (process 19228)]

I can't reproduce this either, on Windows 7 64 bit.

marisn - wrote:

On my Gentoo ~AMD64 Linux system I can crash it always. Could be some configuration switches / GCC flags to blame?

Attachment contains a project and data file to make QGIS crash.
Unzip attachment; Open project in QGIS; Go to "Print composer"; Use select tool to select the lowest square. If necessary, try to move the invisible scale bar, that will appear as a selected rectangle inside the drawn rectangle. CRASH.

tested with your project here on master/ubuntu 14.04, it works all as expected and no crash.

Seems that the crash is related to something specific on my system / my GCC / compilation parameters.
I managed to work around the issue. Following code change makes the problem to disappear. I am not certain if it fixes the root cause, still it allows me to load a project with a scale bar in composer.

diff --git a/src/core/composer/qgscomposerscalebar.cpp b/src/core/composer/qgscomposerscalebar.cpp
index b76e3f8..f2ceee1 100644
--- a/src/core/composer/qgscomposerscalebar.cpp
+++ b/src/core/composer/qgscomposerscalebar.cpp
@@ -407,7 +407,7 @@ void QgsComposerScaleBar::adjustBoxSize()
 void QgsComposerScaleBar::update()
 {
   //Don't adjust box size for numeric scale bars:
-  if ( mStyle->name() != "Numeric" )
+  if ( mStyle && mStyle->name() != "Numeric" )
   {
     adjustBoxSize();
   }

I also noticed that there are a lot of logging related stack traces reported while Composer is open. They happen without and with aforementioned code change. No idea if could be related or just harmless chatter.

Warning: QPainter::setCompositionMode: Blend modes not supported on device
Stacktrace (piped through c++filt):
/home/maris/soft/qgis_bin//bin/qgis[0x50209e]
/home/maris/soft/qgis_bin//bin/qgis(myMessageOutput(QtMsgType, char const*)+0x14f)[0x50252f]
/usr/lib64/qt4/libQtCore.so.4(qt_message_output(QtMsgType, char const*)+0x16)[0x8f9a756]
/usr/lib64/qt4/libQtCore.so.4(+0x70929)[0x8f9a929]
/usr/lib64/qt4/libQtCore.so.4(qWarning(char const*, ...)+0x94)[0x8f9ab74]
/home/maris/soft/qgis_bin//lib/libqgis_core.so.2.5.0(QgsComposerMouseHandles::drawSelectedItemBounds(QPainter*)+0x59)[0x7eac6e9]
/usr/lib64/qt4/libQtGui.so.4(+0x780e57)[0x9b8ae57]
/usr/lib64/qt4/libQtGui.so.4(+0x781c15)[0x9b8bc15]
/usr/lib64/qt4/libQtGui.so.4(+0x7822c6)[0x9b8c2c6]
/usr/lib64/qt4/libQtGui.so.4(QGraphicsView::paintEvent(QPaintEvent*)+0x4de)[0x9ba97de]
/home/maris/soft/qgis_bin//lib/libqgis_gui.so.2.5.0(QgsComposerView::paintEvent(QPaintEvent*)+0x15)[0x860f9d5]
/usr/lib64/qt4/libQtGui.so.4(QWidget::event(QEvent*)+0x8b0)[0x9620830]
/usr/lib64/qt4/libQtGui.so.4(QFrame::event(QEvent*)+0x1e)[0x999d5fe]
/usr/lib64/qt4/libQtGui.so.4(QGraphicsView::viewportEvent(QEvent*)+0x179)[0x9ba85e9]
/usr/lib64/qt4/libQtCore.so.4(QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*)+0x86)[0x90a41b6]
/usr/lib64/qt4/libQtGui.so.4(QApplicationPrivate::notify_helper(QObject*, QEvent*)+0x6c)[0x95d164c]
/usr/lib64/qt4/libQtGui.so.4(QApplication::notify(QObject*, QEvent*)+0x270)[0x95d7bf0]
/home/maris/soft/qgis_bin//lib/libqgis_core.so.2.5.0(QgsApplication::notify(QObject*, QEvent*)+0x5b)[0x7ca1d1b]
/usr/lib64/qt4/libQtCore.so.4(QCoreApplication::notifyInternal(QObject*, QEvent*)+0x6d)[0x90a404d]
/usr/lib64/qt4/libQtGui.so.4(QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*)+0x571)[0x961af51]
src/core/qgsmessagelog.cpp: 45: (logMessage) 2014-10-13T11:50:44 Qt[1] QPainter::setCompositionMode: Blend modes not supported on device

marisn: I've pushed that change- thanks. But it looks like there's something quite strange with your install. Those "Blend modes not supported on device" log messages definitely aren't normal. Can you let me know:
- your Qt version
- your graphics card and what driver you are using
- kernel/xorg/mesa version

Nyall Dawson wrote:

marisn: I've pushed that change- thanks. But it looks like there's something quite strange with your install. Those "Blend modes not supported on device" log messages definitely aren't normal. Can you let me know:
- your Qt version
- your graphics card and what driver you are using
- kernel/xorg/mesa version

dev-qt/qtcore-4.8.5-r2:4
Chipset: "NVIDIA NV98"
AIGLX: reverting to software rendering
GLX: Initialized DRISWRAST GL provider for screen 0
Module nouveau: vendor="X.Org Foundation"
compiled for 1.16.1, module version = 1.0.10
ABI class: X.Org Video Driver, version 18.0
X.Org X Server 1.16.1
Kernel 3.17.0-gentoo
media-libs/mesa-10.3.0

I don't have a hardware acceleration as Nouveau wasn't playing nice with my chip and acceleration on suspend/resume etc.