Fix crash in vector layer iteration on Qt6 builds

Decrementing an iterator which is already at the beginning results in a crash (cherry picked from commit 6776b1b)
qgis · Jul 23, 2021 · c9715e5 · c9715e5
1 parent cd6c395
commit c9715e5
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/core/qgsvectorlayerfeatureiterator.cpp b/src/core/qgsvectorlayerfeatureiterator.cpp
@@ -530,7 +530,8 @@ 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();