Fix crash in raster readXml when data provide cannot be created

elpaso · elpaso · commit 455b660e6bba · 2018-11-05T10:24:35.000+01:00
Actually it was a consequence of a broken test, but there
is no need to crash.
diff --git a/src/core/raster/qgsrasterlayer.cpp b/src/core/raster/qgsrasterlayer.cpp
@@ -1491,6 +1491,12 @@ bool QgsRasterLayer::readXml( const QDomNode &layer_node, QgsReadWriteContext &c
   QgsDataProvider::ProviderOptions providerOptions;
   setDataProvider( mProviderKey, providerOptions );
 
+  if ( ! mDataProvider )
+  {
+    QgsDebugMsg( QStringLiteral( "Raster data provider could not be created for %1" ).arg( mDataSource ) );
+    return false;
+  }
+
   QString error;
   bool res = readSymbology( layer_node, error, context );
 
