VS-942. Fix an error where NO variants were found (#8388)

* Fix a bug where there were NO variants in a range.
broadinstitute · Jun 29, 2023 · ec0ccd8 · ec0ccd8
1 parent b2ed14f
commit ec0ccd8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/main/java/org/broadinstitute/hellbender/tools/gvs/extract/ExtractCohortEngine.java b/src/main/java/org/broadinstitute/hellbender/tools/gvs/extract/ExtractCohortEngine.java
@@ -1150,7 +1150,7 @@ void createVariantsFromSortedRanges(final SortedSet<Long> sampleIdsToExtract,
         }
 
         // finish writing out reference rows
-        if (lastSample != maxSampleId) {
+        if ((lastSample != null) && (lastSample != maxSampleId)) {
             processReferenceData(currentPositionRecords, sortedReferenceRangeIterator, referenceCache, lastPosition, lastSample + 1, maxSampleId, sampleIdsToExtract);
         }