From 4d1f65f2dbe39af25f460729514a616ec98d7489 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Mon, 8 Jun 2020 23:21:43 +0200
Subject: [PATCH] Restore functionality whennot decluttering

---
 src/ol/render/canvas/Executor.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ol/render/canvas/Executor.js b/src/ol/render/canvas/Executor.js
index fa04ae677b..3051d577fd 100644
--- a/src/ol/render/canvas/Executor.js
+++ b/src/ol/render/canvas/Executor.js
@@ -891,10 +891,12 @@ class Executor {
             ) {
               declutterGroups.push(declutterGroup);
             }
-            if (declutterGroup.length - 1 === declutterGroup[0]) {
-              this.declutterItems.push(this, declutterGroup, feature);
+            if (declutterGroup) {
+              if (declutterGroup.length - 1 === declutterGroup[0]) {
+                this.declutterItems.push(this, declutterGroup, feature);
+              }
+              declutterGroupIndex += 1 / declutterGroup[0];
             }
-            declutterGroupIndex += 1 / declutterGroup[0];
           }
           ++i;
           break;