From c1385a9c354003773b79b58c71925fc0cf4b41fa Mon Sep 17 00:00:00 2001
From: ZappoMan <bradh@konamoxt.com>
Date: Thu, 6 Nov 2014 17:41:55 -0800
Subject: [PATCH] fix random crash on checkEnterLeaveEntities

---
 interface/src/entities/EntityTreeRenderer.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/interface/src/entities/EntityTreeRenderer.cpp b/interface/src/entities/EntityTreeRenderer.cpp
index e447c703fb..46406e9f5e 100644
--- a/interface/src/entities/EntityTreeRenderer.cpp
+++ b/interface/src/entities/EntityTreeRenderer.cpp
@@ -196,6 +196,7 @@ void EntityTreeRenderer::update() {
 
 void EntityTreeRenderer::checkEnterLeaveEntities() {
     if (_tree) {
+        _tree->lockForRead();
         glm::vec3 avatarPosition = Application::getInstance()->getAvatar()->getPosition() / (float) TREE_SCALE;
         
         if (avatarPosition != _lastAvatarPosition) {
@@ -240,6 +241,7 @@ void EntityTreeRenderer::checkEnterLeaveEntities() {
             _currentEntitiesInside = entitiesContainingAvatar;
             _lastAvatarPosition = avatarPosition;
         }
+        _tree->unlock();
     }
 }