1 files changed, 5 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/document_source_single_document_transformation.cpp b/src/mongo/db/pipeline/document_source_single_document_transformation.cpp
index a0dc8fbfcf5..4575e9fa02b 100644
--- a/src/mongo/db/pipeline/document_source_single_document_transformation.cpp
+++ b/src/mongo/db/pipeline/document_source_single_document_transformation.cpp
@@ -93,6 +93,11 @@ Value DocumentSourceSingleDocumentTransformation::serialize(
 Pipeline::SourceContainer::iterator DocumentSourceSingleDocumentTransformation::doOptimizeAt(
     Pipeline::SourceContainer::iterator itr, Pipeline::SourceContainer* container) {
     invariant(*itr == this);
+
+    if (std::next(itr) == container->end()) {
+        return container->end();
+    }
+
     auto nextSkip = dynamic_cast<DocumentSourceSkip*>((*std::next(itr)).get());
 
     if (nextSkip) {