From f3bd210ac7b054f837522a56b7bfbe247edc1500 Mon Sep 17 00:00:00 2001
From: Kevin Pedro <kpedro88@gmail.com>
Date: Tue, 12 Sep 2023 09:14:37 -0500
Subject: [PATCH] clearer empty case

---
 .../interface/SiStripApproximateClusterCollection.h             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/DataFormats/SiStripCluster/interface/SiStripApproximateClusterCollection.h b/DataFormats/SiStripCluster/interface/SiStripApproximateClusterCollection.h
index 90f355e43f33b..142706dfe4bda 100644
--- a/DataFormats/SiStripCluster/interface/SiStripApproximateClusterCollection.h
+++ b/DataFormats/SiStripCluster/interface/SiStripApproximateClusterCollection.h
@@ -90,7 +90,7 @@ class SiStripApproximateClusterCollection {
   void reserve(std::size_t dets, std::size_t clusters);
   Filler beginDet(unsigned int detId);
 
-  const_iterator begin() const { return const_iterator(clusters_.empty() ? nullptr : this); }
+  const_iterator begin() const { return clusters_.empty() ? end() : const_iterator(this); }
   const_iterator cbegin() const { return begin(); }
   const_iterator end() const { return const_iterator(); }
   const_iterator cend() const { return end(); }