don't consider the LHS of an AssignmentExpression to be a reference

src/babel/traversal/scope/index.js

@@ -105,14 +105,6 @@ var renameVisitor = {
     }
   },
 
-  Declaration(node, parent, scope, state) {
-    var ids = this.getBindingIdentifiers();
-
-    for (var name in ids) {
-      if (name === state.oldName) ids[name].name = state.newName;
-    }
-  },
-
   Scope(node, parent, scope, state) {
     if (!scope.bindingIdentifierEquals(state.oldName, state.binding)) {
       this.skip();
@@ -120,6 +112,15 @@ var renameVisitor = {
   }
 };
 
+renameVisitor.AssignmentExpression =
+renameVisitor.Declaration = function (node, parent, scope, state) {
+  var ids = this.getBindingIdentifiers();
+
+  for (var name in ids) {
+    if (name === state.oldName) ids[name].name = state.newName;
+  }
+};
+
 export default class Scope {
 
   /**
@@ -548,15 +549,6 @@ export default class Scope {
     return false;
   }
 
-  /**
-   * Description
-   */
-
-  recrawl() {
-    this.path.setData("scopeInfo", null);
-    this.crawl();
-  }
-
   /**
    * Description
    */

src/babel/types/validators.js

@@ -99,6 +99,7 @@ export function isReferenced(node: Object, parent: Object): boolean {
 
     // no: [NODE = foo] = [];
     // yes: [foo = NODE] = [];
+    case "AssignmentExpression":
     case "AssignmentPattern":
       return parent.right === node;