From 8aaadf2fab0ae1a87e77b8658ef4b380c50c31a1 Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Wed, 8 Mar 2017 11:40:02 -0500
Subject: [PATCH] Add check to make sure target exists

---
 src/virtual-machine.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/virtual-machine.js b/src/virtual-machine.js
index 9d8477c45..b7b56af2c 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -336,7 +336,7 @@ VirtualMachine.prototype.emitWorkspaceUpdate = function () {
  */
 VirtualMachine.prototype.getTargetIdForDrawableId = function (drawableId) {
     var target = this.runtime.getTargetByDrawableId(drawableId);
-    if (target.hasOwnProperty('id') && target.hasOwnProperty('isStage') && !target.isStage) {
+    if (target && target.hasOwnProperty('id') && target.hasOwnProperty('isStage') && !target.isStage) {
         return target.id;
     }
     return null;