From 13a6c696681de0eac6eb1945f41907aceb94887c Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Thu, 7 May 2015 23:02:40 +0100
Subject: [PATCH] add node existence check to each visitor call

---
 src/babel/traversal/path/index.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/babel/traversal/path/index.js b/src/babel/traversal/path/index.js
index 408726f235..6ac9cc1819 100644
--- a/src/babel/traversal/path/index.js
+++ b/src/babel/traversal/path/index.js
@@ -696,6 +696,9 @@ export default class TraversalPath {
     for (var fn of (fns: Array)) {
       if (!fn) continue;
 
+      var node = this.node;
+      if (!node) return;
+
       // call the function with the params (node, parent, scope, state)
       var replacement = fn.call(this, node, this.parent, this.scope, this.state);
       if (replacement) {
@@ -703,11 +706,11 @@ export default class TraversalPath {
         this.replaceWith(replacement, true);
         if (this.type !== previousType) {
           this.queueNode(this);
-          break;
+          return;
         }
       }
 
-      if (this.shouldStop || this.removed) break;
+      if (this.shouldStop || this.removed) return;
     }
   }