From 3967adcb4a2eb0d26f070e2574e4fb781b071399 Mon Sep 17 00:00:00 2001
From: Andrew Pendleton <andrew@mapbox.com>
Date: Wed, 30 Mar 2016 01:10:20 -0400
Subject: [PATCH] Avoid callstack loop by making sure only one geocoder data
 iterator buffer-flush operation is happening at once

---
 lib/mbtiles.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/mbtiles.js b/lib/mbtiles.js
index 6647b71..b178a07 100644
--- a/lib/mbtiles.js
+++ b/lib/mbtiles.js
@@ -625,7 +625,11 @@ MBTiles.prototype.geocoderDataIterator = function(type) {
     var doneSentinel = {};
     var _this = this;
 
+    var sending = false;
     var sendIfAvailable = function() {
+        if (sending) return;
+        sending = true;
+
         while (nextQueue.length && dataQueue.length) {
             var nextCb = nextQueue.shift(), data;
             if (dataQueue[0] == doneSentinel) {
@@ -637,6 +641,8 @@ MBTiles.prototype.geocoderDataIterator = function(type) {
                 nextCb({value: {shard: data.shard, data: zlib.inflateSync(data.data)}, done: false});
             }
         }
+
+        sending = false;
     }
 
     var refilling = false;