From 7ed58da1cff4517f8917ee5f3dd1817c59265236 Mon Sep 17 00:00:00 2001
From: DD <liudi08@gmail.com>
Date: Thu, 11 Jan 2018 16:43:18 -0500
Subject: [PATCH] fix set editing target function

---
 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 d1d8c2a14..61b61e518 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -631,7 +631,7 @@ class VirtualMachine extends EventEmitter {
      */
     setEditingTarget (targetId) {
         // Has the target id changed? If not, exit.
-        if (targetId === this.editingTarget.id) {
+        if (this.editingTarget && targetId === this.editingTarget.id) {
             return;
         }
         const target = this.runtime.getTargetById(targetId);