From a9f369479fd5876d27eeadbc5716a8582c782175 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Wed, 17 May 2017 00:02:28 +0200
Subject: [PATCH] Dispose of vector tiles properly

---
 src/ol/vectortile.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/ol/vectortile.js b/src/ol/vectortile.js
index be1ece56c9..6a82372fc6 100644
--- a/src/ol/vectortile.js
+++ b/src/ol/vectortile.js
@@ -66,6 +66,18 @@ ol.VectorTile = function(tileCoord, state, src, format, tileLoadFunction) {
 ol.inherits(ol.VectorTile, ol.Tile);
 
 
+/**
+ * @inheritDoc
+ */
+ol.VectorTile.prototype.disposeInternal = function() {
+  this.features_ = null;
+  this.replayGroups_ = {};
+  this.state = ol.TileState.ABORT;
+  this.changed();
+  ol.Tile.prototype.disposeInternal.call(this);
+};
+
+
 /**
  * Get the feature format assigned for reading this tile's features.
  * @return {ol.format.Feature} Feature format.