Fix crash in vector layer iteration on Qt6 builds

Decrementing an iterator which is already at the beginning results in a crash
qgis · Jul 20, 2021 · 6776b1b · 6776b1b
1 parent 81b934d
commit 6776b1b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/core/vector/qgsvectorlayerfeatureiterator.cpp b/src/core/vector/qgsvectorlayerfeatureiterator.cpp
@@ -536,7 +536,8 @@ bool QgsVectorLayerFeatureIterator::isValid() const
 
 bool QgsVectorLayerFeatureIterator::fetchNextAddedFeature( QgsFeature &f )
 {
-  while ( mFetchAddedFeaturesIt-- != mSource->mAddedFeatures.constBegin() )
+  while ( mFetchAddedFeaturesIt != mSource->mAddedFeatures.constBegin() &&
+          mFetchAddedFeaturesIt-- != mSource->mAddedFeatures.constBegin() )
   {
     QgsFeatureId fid = mFetchAddedFeaturesIt->id();