Merge pull request #8803 from lucianpls/master

MRF: Avoid crashes when no overviews can be generated
OSGeo · Nov 24, 2023 · ec1d128 · ec1d128
2 parents 13e8d6c + 85cd0dc
commit ec1d128
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/frmts/mrf/marfa_dataset.cpp b/frmts/mrf/marfa_dataset.cpp
@@ -327,6 +327,11 @@ CPLErr MRFDataset::IBuildOverviews(const char *pszResampling, int nOverviews,
                 // Initialize the empty overlays, all of them for a given scale
                 // They could already exist, in which case they are not erased
                 idxSize = AddOverviews(int(scale));
+
+                // If we don't have overviews, don't try to generate them
+                if (GetRasterBand(1)->GetOverviewCount() == 0)
+                    throw CE_None;
+
                 if (!CheckFileSize(current.idxfname, idxSize, GA_Update))
                 {
                     CPLError(CE_Failure, CPLE_AppDefined,