From 92469901f751ecd955be8d4f66decd481f8d5fd2 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 26 Nov 2013 12:15:40 +0100
Subject: [PATCH] Clone extents in ol.structs.RBush to prevent modification

---
 src/ol/structs/rbush.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ol/structs/rbush.js b/src/ol/structs/rbush.js
index e52bf5ec50..88c21b6c73 100644
--- a/src/ol/structs/rbush.js
+++ b/src/ol/structs/rbush.js
@@ -495,7 +495,7 @@ ol.structs.RBush.prototype.insert = function(extent, value) {
   var key = this.getKey_(value);
   goog.asserts.assert(!this.valueExtent_.hasOwnProperty(key));
   this.insert_(extent, value, this.root_.height - 1);
-  this.valueExtent_[key] = extent;
+  this.valueExtent_[key] = ol.extent.clone(extent);
 };
 
 
@@ -631,6 +631,6 @@ ol.structs.RBush.prototype.update = function(extent, value) {
   if (!ol.extent.equals(currentExtent, extent)) {
     this.remove_(currentExtent, value);
     this.insert_(extent, value, this.root_.height - 1);
-    this.valueExtent_[key] = extent;
+    ol.extent.clone(extent, currentExtent);
   }
 };