diff --git a/src/app/qgsattributetabledialog.cpp b/src/app/qgsattributetabledialog.cpp
index 196ee15ee0d..21b56b6af22 100644
--- a/src/app/qgsattributetabledialog.cpp
+++ b/src/app/qgsattributetabledialog.cpp
@@ -287,7 +287,11 @@ void QgsAttributeTableDialog::columnBoxInit()
 
   foreach ( const QgsField field, fields )
   {
-    if ( mLayer->editorWidgetV2( mLayer->fieldNameIndex( field.name() ) ) != "Hidden" )
+    int idx = mLayer->fieldNameIndex( field.name() );
+    if ( idx < 0 )
+      continue;
+
+    if ( mLayer->editorWidgetV2( idx ) != "Hidden" )
     {
       QIcon icon = QgsApplication::getThemeIcon( "/mActionNewAttribute.png" );
       QString text = field.name();
@@ -650,6 +654,9 @@ void QgsAttributeTableDialog::filterQueryChanged( const QString& query )
 
     const QgsFields& flds = mLayer->pendingFields();
     int fldIndex = mLayer->fieldNameIndex( fieldName );
+    if ( fldIndex < 0 )
+      return;
+
     QVariant::Type fldType = flds[fldIndex].type();
     bool numeric = ( fldType == QVariant::Int || fldType == QVariant::Double );
 
diff --git a/src/app/qgsfieldsproperties.cpp b/src/app/qgsfieldsproperties.cpp
index 3a8f20f2ee6..57348d51bfa 100644
--- a/src/app/qgsfieldsproperties.cpp
+++ b/src/app/qgsfieldsproperties.cpp
@@ -550,6 +550,9 @@ void QgsFieldsProperties::on_mDeleteAttributeButton_clicked()
     if ( item->column() == 0 )
     {
       int idx = mIndexedWidgets.indexOf( item );
+      if ( idx < 0 )
+        continue;
+
       if ( mLayer->pendingFields().fieldOrigin( idx ) == QgsFields::OriginExpression )
         expressionFields << idx;
       else
diff --git a/src/app/qgsmaptoolmovelabel.cpp b/src/app/qgsmaptoolmovelabel.cpp
index 7d12e7ec89d..a3d456c1f49 100644
--- a/src/app/qgsmaptoolmovelabel.cpp
+++ b/src/app/qgsmaptoolmovelabel.cpp
@@ -24,6 +24,8 @@
 
 QgsMapToolMoveLabel::QgsMapToolMoveLabel( QgsMapCanvas* canvas )
     : QgsMapToolLabel( canvas )
+    , mClickOffsetX( 0 )
+    , mClickOffsetY( 0 )
 {
   mToolName = tr( "Move label" );
 }
diff --git a/src/app/qgsmergeattributesdialog.cpp b/src/app/qgsmergeattributesdialog.cpp
index f1fd4621571..15066b530b7 100644
--- a/src/app/qgsmergeattributesdialog.cpp
+++ b/src/app/qgsmergeattributesdialog.cpp
@@ -194,6 +194,9 @@ void QgsMergeAttributesDialog::comboValueChanged( const QString &text )
     return;
   }
   int column = findComboColumn( senderComboBox );
+  if ( column < 0 )
+    return;
+
   refreshMergedValue( column );
 }
 
diff --git a/src/core/layertree/qgslayertreemodellegendnode.cpp b/src/core/layertree/qgslayertreemodellegendnode.cpp
index 1ac1ead304c..c1352a19dce 100644
--- a/src/core/layertree/qgslayertreemodellegendnode.cpp
+++ b/src/core/layertree/qgslayertreemodellegendnode.cpp
@@ -476,7 +476,7 @@ QSizeF QgsRasterSymbolLegendNode::drawSymbol( const QgsLegendSettings& settings,
     if ( QgsRasterLayer* rasterLayer = dynamic_cast<QgsRasterLayer*>( layerNode()->layer() ) )
     {
       if ( QgsRasterRenderer* rasterRenderer = rasterLayer->renderer() )
-        itemColor.setAlpha( rasterRenderer ? rasterRenderer->opacity() * 255.0 : 255 );
+        itemColor.setAlpha( rasterRenderer->opacity() * 255.0 );
     }
 
     ctx->painter->setBrush( itemColor );
diff --git a/src/core/qgscoordinatetransform.cpp b/src/core/qgscoordinatetransform.cpp
index 019fb1e8137..ce0515c6b2a 100644
--- a/src/core/qgscoordinatetransform.cpp
+++ b/src/core/qgscoordinatetransform.cpp
@@ -39,6 +39,7 @@ extern "C"
 
 QgsCoordinateTransform::QgsCoordinateTransform()
     : QObject()
+    , mShortCircuit( false )
     , mInitialisedFlag( false )
     , mSourceProjection( 0 )
     , mDestinationProjection( 0 )
@@ -50,6 +51,7 @@ QgsCoordinateTransform::QgsCoordinateTransform()
 
 QgsCoordinateTransform::QgsCoordinateTransform( const QgsCoordinateReferenceSystem& source, const QgsCoordinateReferenceSystem& dest )
     : QObject()
+    , mShortCircuit( false )
     , mInitialisedFlag( false )
     , mSourceProjection( 0 )
     , mDestinationProjection( 0 )
diff --git a/src/core/qgscoordinatetransform.h b/src/core/qgscoordinatetransform.h
index 7b65007b6f0..ca30c2f942d 100644
--- a/src/core/qgscoordinatetransform.h
+++ b/src/core/qgscoordinatetransform.h
@@ -200,12 +200,12 @@ class CORE_EXPORT QgsCoordinateTransform : public QObject
      * Flag to indicate whether the coordinate systems have been initialised
      * @return true if initialised, otherwise false
      */
-    bool isInitialised() const {return mInitialisedFlag;};
+    bool isInitialised() const {return mInitialisedFlag;}
 
     /*! See if the transform short circuits because src and dest are equivalent
      * @return bool True if it short circuits
      */
-    bool isShortCircuited() {return mShortCircuit;};
+    bool isShortCircuited() {return mShortCircuit;}
 
     /*! Change the destination coordinate system by passing it a qgis srsid
     * A QGIS srsid is a unique key value to an entry on the tbl_srs in the
diff --git a/src/core/qgsfeaturerequest.cpp b/src/core/qgsfeaturerequest.cpp
index bf2986abe86..412a1228c7f 100644
--- a/src/core/qgsfeaturerequest.cpp
+++ b/src/core/qgsfeaturerequest.cpp
@@ -24,6 +24,7 @@ const QString QgsFeatureRequest::AllAttributes = QString( "#!allattributes!#" );
 
 QgsFeatureRequest::QgsFeatureRequest()
     : mFilter( FilterNone )
+    , mFilterFid( -1 )
     , mFilterExpression( 0 )
     , mFlags( 0 )
 {
diff --git a/src/core/qgsfield.cpp b/src/core/qgsfield.cpp
index ffd10951134..7f13f509b43 100644
--- a/src/core/qgsfield.cpp
+++ b/src/core/qgsfield.cpp
@@ -185,6 +185,9 @@ bool QgsFields::appendExpressionField( const QgsField& field, int originIndex )
 
 void QgsFields::remove( int fieldIdx )
 {
+  if ( !exists( fieldIdx ) )
+    return;
+
   mNameToIndex.remove( mFields[fieldIdx].field.name() );
   mFields.remove( fieldIdx );
 }
@@ -197,6 +200,14 @@ void QgsFields::extend( const QgsFields& other )
   }
 }
 
+QgsFields::FieldOrigin QgsFields::fieldOrigin( int fieldIdx ) const
+{
+  if ( !exists( fieldIdx ) )
+    return OriginUnknown;
+
+  return mFields[fieldIdx].origin;
+}
+
 QList<QgsField> QgsFields::toList() const
 {
   QList<QgsField> lst;
diff --git a/src/core/qgsfield.h b/src/core/qgsfield.h
index 19c89131443..0fab69c20ef 100644
--- a/src/core/qgsfield.h
+++ b/src/core/qgsfield.h
@@ -231,7 +231,7 @@ class CORE_EXPORT QgsFields
     const QgsField& field( const QString& name ) const { return mFields[ indexFromName( name )].field; }
 
     //! Get field's origin (value from an enumeration)
-    FieldOrigin fieldOrigin( int fieldIdx ) const { return mFields[fieldIdx].origin; }
+    FieldOrigin fieldOrigin( int fieldIdx ) const;
     //! Get field's origin index (its meaning is specific to each type of origin)
     int fieldOriginIndex( int fieldIdx ) const { return mFields[fieldIdx].originIndex; }
 
@@ -261,6 +261,7 @@ class CORE_EXPORT QgsFields
 
     //! map for quick resolution of name to index
     QHash<QString, int> mNameToIndex;
+
 };
 
 
diff --git a/src/core/qgsmaprenderer.cpp b/src/core/qgsmaprenderer.cpp
index 4d75d27a6ca..2222d993c0a 100644
--- a/src/core/qgsmaprenderer.cpp
+++ b/src/core/qgsmaprenderer.cpp
@@ -175,7 +175,7 @@ void QgsMapRenderer::adjustExtentToSize()
   if ( !myWidth || !myHeight )
   {
     mScale = 1.0;
-    newCoordXForm.setParameters( 0, 0, 0, 0 );
+    newCoordXForm.setParameters( 1, 0, 0, 0 );
     return;
   }
 
diff --git a/src/core/qgsmessageoutput.cpp b/src/core/qgsmessageoutput.cpp
index 0c0766b9c15..4870504088e 100644
--- a/src/core/qgsmessageoutput.cpp
+++ b/src/core/qgsmessageoutput.cpp
@@ -47,6 +47,7 @@ QgsMessageOutput::~QgsMessageOutput()
 
 QgsMessageOutputConsole::QgsMessageOutputConsole()
     : mMessage( "" )
+    , mMsgType( MessageText )
 {
 }
 
diff --git a/src/core/qgsvectorlayer.cpp b/src/core/qgsvectorlayer.cpp
index 8d9ae0485f4..5d67a1d228c 100644
--- a/src/core/qgsvectorlayer.cpp
+++ b/src/core/qgsvectorlayer.cpp
@@ -2091,6 +2091,9 @@ void QgsVectorLayer::addAttributeEditorWidget( QgsAttributeEditorElement* data )
 
 const QString QgsVectorLayer::editorWidgetV2( int fieldIdx ) const
 {
+  if ( fieldIdx < 0 || fieldIdx >= mUpdatedFields.count() )
+    return "TextEdit";
+
   return mEditorWidgetV2Types.value( mUpdatedFields[fieldIdx].name(), "TextEdit" );
 }
 
diff --git a/src/core/raster/qgshuesaturationfilter.cpp b/src/core/raster/qgshuesaturationfilter.cpp
index 836c7625e49..06148d20ee1 100644
--- a/src/core/raster/qgshuesaturationfilter.cpp
+++ b/src/core/raster/qgshuesaturationfilter.cpp
@@ -25,9 +25,12 @@
 QgsHueSaturationFilter::QgsHueSaturationFilter( QgsRasterInterface* input )
     : QgsRasterInterface( input ),
     mSaturation( 0 ),
+    mSaturationScale( 1 ),
     mGrayscaleMode( QgsHueSaturationFilter::GrayscaleOff ),
     mColorizeOn( false ),
     mColorizeColor( QColor::fromRgb( 255, 128, 128 ) ),
+    mColorizeH( 0 ),
+    mColorizeS( 50 ),
     mColorizeStrength( 100 )
 {
 }
diff --git a/src/core/raster/qgsrasterblock.cpp b/src/core/raster/qgsrasterblock.cpp
index ea1afb48561..8c34c3d1d6f 100644
--- a/src/core/raster/qgsrasterblock.cpp
+++ b/src/core/raster/qgsrasterblock.cpp
@@ -261,6 +261,7 @@ QGis::DataType QgsRasterBlock::typeWithNoDataValue( QGis::DataType dataType, dou
     case QGis::Float64:
       *noDataValue = std::numeric_limits<double>::max() * -1.0;
       newDataType = QGis::Float64;
+      break;
     default:
       QgsDebugMsg( QString( "Unknow data type %1" ).arg( dataType ) );
       return QGis::UnknownDataType;
diff --git a/src/core/symbology-ng/qgscptcityarchive.cpp b/src/core/symbology-ng/qgscptcityarchive.cpp
index b9d8c26a3a8..8e4eac4e07d 100644
--- a/src/core/symbology-ng/qgscptcityarchive.cpp
+++ b/src/core/symbology-ng/qgscptcityarchive.cpp
@@ -984,7 +984,7 @@ QMap< QString, QStringList > QgsCptCityDirectoryItem::rampsMap()
     curName = schemeName;
     curVariant = "";
 
-    // stupid code to find if name ends with 1-3 digit number - should use regexp
+    // find if name ends with 1-3 digit number
     // TODO need to detect if ends with b/c also
     if ( schemeName.length() > 1 && schemeName.endsWith( "a" ) && ! listVariant.isEmpty() &&
          (( prevName + listVariant.last()  + "a" ) == curName ) )
@@ -994,32 +994,15 @@ QMap< QString, QStringList > QgsCptCityDirectoryItem::rampsMap()
     }
     else
     {
-      num = schemeName.right( 3 ).toInt( &ok );
-      Q_UNUSED( num );
-      if ( ok )
+      QRegExp rxVariant( "^(.*[^\\d])(\\d{1,3})$" );
+      int pos = rxVariant.indexIn( schemeName );
+      if ( pos > -1 )
       {
-        curName = schemeName.left( schemeName.size() - 3 );
-        curVariant = schemeName.right( 3 );
-      }
-      else
-      {
-        num = schemeName.right( 2 ).toInt( &ok );
-        if ( ok )
-        {
-          curName = schemeName.left( schemeName.size() - 2 );
-          curVariant = schemeName.right( 2 );
-        }
-        else
-        {
-          num = schemeName.right( 1 ).toInt( &ok );
-          if ( ok )
-          {
-            curName = schemeName.left( schemeName.size() - 1 );
-            curVariant = schemeName.right( 1 );
-          }
-        }
+        curName = rxVariant.cap( 1 );
+        curVariant = rxVariant.cap( 2 );
       }
     }
+
     curSep = curName.right( 1 );
     if ( curSep == "-" || curSep == "_" )
     {
diff --git a/src/core/symbology-ng/qgsfillsymbollayerv2.cpp b/src/core/symbology-ng/qgsfillsymbollayerv2.cpp
index 1f002fab074..903b1197c01 100644
--- a/src/core/symbology-ng/qgsfillsymbollayerv2.cpp
+++ b/src/core/symbology-ng/qgsfillsymbollayerv2.cpp
@@ -1437,7 +1437,14 @@ void QgsShapeburstFillSymbolLayerV2::dtArrayToQImage( double * array, QImage *im
       squaredVal = array[idx];
 
       //scale result to fit in the range [0, 1]
-      pixVal = squaredVal > 0 ? qMin(( sqrt( squaredVal ) / maxDistanceValue ), 1.0 ) : 0;
+      if ( maxDistanceValue > 0 )
+      {
+        pixVal = squaredVal > 0 ? qMin(( sqrt( squaredVal ) / maxDistanceValue ), 1.0 ) : 0;
+      }
+      else
+      {
+        pixVal = 1.0;
+      }
 
       //convert value to color from ramp
       pixColor = ramp->color( pixVal );
diff --git a/src/core/symbology-ng/qgsheatmaprenderer.cpp b/src/core/symbology-ng/qgsheatmaprenderer.cpp
index a213f76fd37..156b940553a 100644
--- a/src/core/symbology-ng/qgsheatmaprenderer.cpp
+++ b/src/core/symbology-ng/qgsheatmaprenderer.cpp
@@ -31,12 +31,17 @@
 
 QgsHeatmapRenderer::QgsHeatmapRenderer( )
     : QgsFeatureRendererV2( "heatmapRenderer" )
+    , mCalculatedMaxValue( 0 )
     , mRadius( 10 )
+    , mRadiusPixels( 0 )
+    , mRadiusSquared( 0 )
     , mRadiusUnit( QgsSymbolV2::MM )
+    , mWeightAttrNum( -1 )
     , mGradientRamp( 0 )
     , mInvertRamp( false )
     , mExplicitMax( 0.0 )
     , mRenderQuality( 1 )
+    , mFeaturesRendered( 0 )
 {
   mGradientRamp = new QgsVectorGradientColorRampV2( QColor( 255, 255, 255 ), QColor( 0, 0, 0 ) );
 
diff --git a/src/gui/attributetable/qgsdualview.cpp b/src/gui/attributetable/qgsdualview.cpp
index 16e41a5e233..960287dea2f 100644
--- a/src/gui/attributetable/qgsdualview.cpp
+++ b/src/gui/attributetable/qgsdualview.cpp
@@ -154,7 +154,11 @@ void QgsDualView::columnBoxInit()
 
   Q_FOREACH ( const QgsField& field, fields )
   {
-    if ( mLayerCache->layer()->editorWidgetV2( mLayerCache->layer()->fieldNameIndex( field.name() ) ) != "Hidden" )
+    int fieldIndex = mLayerCache->layer()->fieldNameIndex( field.name() );
+    if ( fieldIndex == -1 )
+      continue;
+
+    if ( mLayerCache->layer()->editorWidgetV2( fieldIndex ) != "Hidden" )
     {
       QIcon icon = QgsApplication::getThemeIcon( "/mActionNewAttribute.png" );
       QString text = field.name();
diff --git a/src/gui/qgsattributeform.cpp b/src/gui/qgsattributeform.cpp
index 73ac159d5f8..66c2d791de1 100644
--- a/src/gui/qgsattributeform.cpp
+++ b/src/gui/qgsattributeform.cpp
@@ -421,6 +421,9 @@ void QgsAttributeForm::init()
     Q_FOREACH ( const QgsField& field, mLayer->pendingFields().toList() )
     {
       int idx = mLayer->fieldNameIndex( field.name() );
+      if ( idx < 0 )
+        continue;
+
       //show attribute alias if available
       QString fieldName = mLayer->attributeDisplayName( idx );
 
diff --git a/src/gui/qgscomposerruler.cpp b/src/gui/qgscomposerruler.cpp
index db6814c5874..1f32746e6a3 100644
--- a/src/gui/qgscomposerruler.cpp
+++ b/src/gui/qgscomposerruler.cpp
@@ -234,6 +234,9 @@ void QgsComposerRuler::drawRotatedText( QPainter *painter, QPointF pos, const QS
 
 void QgsComposerRuler::drawSmallDivisions( QPainter *painter, double startPos, int numDivisions, double rulerScale, double maxPos )
 {
+  if ( numDivisions == 0 )
+    return;
+
   //draw small divisions starting at startPos (in mm)
   double smallMarkerPos = startPos;
   double smallDivisionSpacing = rulerScale / numDivisions;
diff --git a/src/gui/qgscomposerview.cpp b/src/gui/qgscomposerview.cpp
index 1e48ad2074c..6e4cef2f9fc 100644
--- a/src/gui/qgscomposerview.cpp
+++ b/src/gui/qgscomposerview.cpp
@@ -49,6 +49,8 @@
 
 QgsComposerView::QgsComposerView( QWidget* parent, const char* name, Qt::WindowFlags f )
     : QGraphicsView( parent )
+    , mCurrentTool( Select )
+    , mPreviousTool( Select )
     , mRubberBandItem( 0 )
     , mRubberBandLineItem( 0 )
     , mMoveContentItem( 0 )
diff --git a/src/gui/qgsexpressionbuilderwidget.cpp b/src/gui/qgsexpressionbuilderwidget.cpp
index 685176a2556..65ea8abb1a3 100644
--- a/src/gui/qgsexpressionbuilderwidget.cpp
+++ b/src/gui/qgsexpressionbuilderwidget.cpp
@@ -274,6 +274,10 @@ void QgsExpressionBuilderWidget::fillFieldValues( int fieldIndex, int countLimit
 
   // TODO We should thread this so that we don't hold the user up if the layer is massive.
   mValueListWidget->clear();
+
+  if ( fieldIndex < 0 )
+    return;
+
   mValueListWidget->setUpdatesEnabled( false );
   mValueListWidget->blockSignals( true );
 
@@ -566,6 +570,7 @@ void QgsExpressionBuilderWidget::loadSampleValues()
 
   mValueGroupBox->show();
   int fieldIndex = mLayer->fieldNameIndex( item->text() );
+
   fillFieldValues( fieldIndex, 10 );
 }
 
diff --git a/src/gui/qgsidentifymenu.h b/src/gui/qgsidentifymenu.h
index a3327d486d9..4a5a63aed8c 100644
--- a/src/gui/qgsidentifymenu.h
+++ b/src/gui/qgsidentifymenu.h
@@ -48,6 +48,7 @@ class GUI_EXPORT QgsIdentifyMenu : public QMenu
           , mAllResults( false )
           , mIsExternalAction( false )
           , mLayer( NULL )
+          , mFeatureId( 0 )
           , mLevel( LayerLevel )
           , mMapLayerAction( NULL )
       {}
@@ -57,6 +58,7 @@ class GUI_EXPORT QgsIdentifyMenu : public QMenu
           , mAllResults( layer == 0 )
           , mIsExternalAction( mapLayerAction != 0 )
           , mLayer( layer )
+          , mFeatureId( 0 )
           , mLevel( LayerLevel )
           , mMapLayerAction( mapLayerAction )
       {}
diff --git a/src/gui/symbology-ng/qgsrulebasedrendererv2widget.cpp b/src/gui/symbology-ng/qgsrulebasedrendererv2widget.cpp
index 42db841b910..dffadba4767 100644
--- a/src/gui/symbology-ng/qgsrulebasedrendererv2widget.cpp
+++ b/src/gui/symbology-ng/qgsrulebasedrendererv2widget.cpp
@@ -581,8 +581,10 @@ QgsRendererRulePropsDialog::QgsRendererRulePropsDialog( QgsRuleBasedRendererV2::
   {
     groupScale->setChecked( true );
     // caution: rule uses scale denom, scale widget uses true scales
-    mScaleRangeWidget->setMaximumScale( 1.0 / rule->scaleMinDenom() );
-    mScaleRangeWidget->setMinimumScale( 1.0 / rule->scaleMaxDenom() );
+    if ( rule->scaleMinDenom() > 0 )
+      mScaleRangeWidget->setMaximumScale( 1.0 / rule->scaleMinDenom() );
+    if ( rule->scaleMaxDenom() > 0 )
+      mScaleRangeWidget->setMinimumScale( 1.0 / rule->scaleMaxDenom() );
   }
 
   if ( mRule->symbol() )
diff --git a/src/plugins/heatmap/heatmap.cpp b/src/plugins/heatmap/heatmap.cpp
index 77447f56424..f9ae7c2aca8 100644
--- a/src/plugins/heatmap/heatmap.cpp
+++ b/src/plugins/heatmap/heatmap.cpp
@@ -444,7 +444,7 @@ double Heatmap::quarticKernel( const double distance, const int bandwidth, const
     case Heatmap::Scaled:
     {
       // Normalizing constant
-      double k = outputType == Heatmap::Scaled ? 116. / ( 5. * M_PI * pow(( double )bandwidth, 2 ) ) : 1.0;
+      double k = 116. / ( 5. * M_PI * pow(( double )bandwidth, 2 ) );
 
       // Derived from Wand and Jones (1995), p. 175
       return k * ( 15. / 16. ) * pow( 1. - pow( distance / ( double )bandwidth, 2 ), 2 );
@@ -461,7 +461,7 @@ double Heatmap::triweightKernel( const double distance, const int bandwidth, con
     case Heatmap::Scaled:
     {
       // Normalizing constant
-      double k = outputType == Heatmap::Scaled ? 128. / ( 35. * M_PI * pow(( double )bandwidth, 2 ) ) : 1.0;
+      double k = 128. / ( 35. * M_PI * pow(( double )bandwidth, 2 ) );
 
       // Derived from Wand and Jones (1995), p. 175
       return k * ( 35. / 32. ) * pow( 1. - pow( distance / ( double )bandwidth, 2 ), 3 );
@@ -478,7 +478,7 @@ double Heatmap::epanechnikovKernel( const double distance, const int bandwidth,
     case Heatmap::Scaled:
     {
       // Normalizing constant
-      double k = outputType == Heatmap::Scaled ? 8. / ( 3. * M_PI * pow(( double )bandwidth, 2 ) ) : 1.0;
+      double k = 8. / ( 3. * M_PI * pow(( double )bandwidth, 2 ) );
 
       // Derived from Wand and Jones (1995), p. 175
       return k * ( 3. / 4. ) * ( 1. - pow( distance / ( double )bandwidth, 2 ) );
diff --git a/src/plugins/roadgraph/shortestpathwidget.cpp b/src/plugins/roadgraph/shortestpathwidget.cpp
index 4c95bb9daa2..62cf0b98636 100644
--- a/src/plugins/roadgraph/shortestpathwidget.cpp
+++ b/src/plugins/roadgraph/shortestpathwidget.cpp
@@ -281,6 +281,18 @@ QgsGraph* RgShortestPathWidget::getPath( QgsPoint& p1, QgsPoint& p2 )
   QgsGraph *graph = builder.graph();
 
   int startVertexIdx = graph->findVertex( p1 );
+  if ( startVertexIdx < 0 )
+  {
+    mPlugin->iface()->messageBar()->pushMessage(
+      tr( "Cannot calculate path" ),
+      tr( "Could not find start vertex. Please check your input data." ),
+      QgsMessageBar::WARNING,
+      mPlugin->iface()->messageTimeout()
+    );
+
+    delete graph;
+    return NULL;
+  }
 
   int criterionNum = 0;
   if ( mCriterionName->currentIndex() > 0 )
@@ -328,6 +340,9 @@ void RgShortestPathWidget::findingPath()
   QList< QgsPoint > p;
   while ( startVertexIdx != stopVertexIdx )
   {
+    if ( stopVertexIdx < 0 )
+      break;
+
     QgsGraphArcIdList l = path->vertex( stopVertexIdx ).inArc();
     if ( l.empty() )
       break;
@@ -399,6 +414,9 @@ void RgShortestPathWidget::exportPath()
   QgsPolyline p;
   while ( startVertexIdx != stopVertexIdx )
   {
+    if ( stopVertexIdx < 0 )
+      break;
+
     QgsGraphArcIdList l = path->vertex( stopVertexIdx ).inArc();
     if ( l.empty() )
       break;
diff --git a/src/providers/mssql/qgsmssqldataitems.h b/src/providers/mssql/qgsmssqldataitems.h
index de1ff5ce9f7..cc3fcd31268 100644
--- a/src/providers/mssql/qgsmssqldataitems.h
+++ b/src/providers/mssql/qgsmssqldataitems.h
@@ -62,7 +62,7 @@ class QgsMssqlConnectionItem : public QgsDataCollectionItem
     virtual bool handleDrop( const QMimeData * data, Qt::DropAction action ) override;
     void refresh() override;
 
-    QString connInfo() const { return mConnInfo; };
+    QString connInfo() const { return mConnInfo; }
 
   signals:
     void addGeometryColumn( QgsMssqlLayerProperty );
@@ -98,7 +98,7 @@ class QgsMssqlSchemaItem : public QgsDataCollectionItem
     QVector<QgsDataItem*> createChildren() override;
 
     QgsMssqlLayerItem* addLayer( QgsMssqlLayerProperty layerProperty, bool refresh );
-    void refresh() override {}; // do not refresh directly
+    void refresh() override {} // do not refresh directly
     void addLayers( QgsDataItem* newLayers );
 };
 
@@ -113,7 +113,6 @@ class QgsMssqlLayerItem : public QgsLayerItem
     QString createUri();
 
     QgsMssqlLayerItem* createClone();
-    bool Used;
 
   private:
     QgsMssqlLayerProperty mLayerProperty;
diff --git a/src/providers/spatialite/qgsspatialiteprovider.cpp b/src/providers/spatialite/qgsspatialiteprovider.cpp
index 1e73bda5530..c3189449d66 100644
--- a/src/providers/spatialite/qgsspatialiteprovider.cpp
+++ b/src/providers/spatialite/qgsspatialiteprovider.cpp
@@ -5341,13 +5341,11 @@ QGISEXTERN bool saveStyle( const QString& uri, const QString& qmlStyle, const QS
     return false;
   }
 
-  bool saved = ( SQLITE_OK == ret ) ? true : false;
-
   if ( NULL != errMsg )
     sqlite3_free( errMsg );
 
   QgsSqliteHandle::closeDb( handle );
-  return saved;
+  return true;
 }
 
 
diff --git a/src/providers/wcs/qgswcscapabilities.cpp b/src/providers/wcs/qgswcscapabilities.cpp
index 79108630d19..dd8e4f88de4 100644
--- a/src/providers/wcs/qgswcscapabilities.cpp
+++ b/src/providers/wcs/qgswcscapabilities.cpp
@@ -79,6 +79,7 @@ QgsWcsCapabilities::QgsWcsCapabilities()
     : mCapabilities()
     , mCapabilitiesReply( NULL )
     , mCoverageCount( 0 )
+    , mCacheLoadControl( QNetworkRequest::PreferNetwork )
 {
 }
 
diff --git a/src/server/qgsremoteowsbuilder.cpp b/src/server/qgsremoteowsbuilder.cpp
index 6cfd39906f6..838a2996cce 100644
--- a/src/server/qgsremoteowsbuilder.cpp
+++ b/src/server/qgsremoteowsbuilder.cpp
@@ -213,7 +213,7 @@ QgsRasterLayer* QgsRemoteOWSBuilder::wmsLayerFromUrl( const QString& url, const
   uri.setParam( "crs", crs );
   uri.setParam( "layers", layerList );
   uri.setParam( "styles", styleList );
-  result = new QgsRasterLayer( uri.encodedUri(), "", "wms" );
+  result = new QgsRasterLayer( uri.encodedUri(), "", QString( "wms" ) );
   if ( !result->isValid() )
   {
     return 0;