From 76eb259ea854e03929cad89abfa3599014e551af Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Tue, 15 Sep 2015 06:18:04 +0100
Subject: [PATCH] only allow identifiers as rest expressions

---
 packages/babylon/src/parser/lval.js | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/packages/babylon/src/parser/lval.js b/packages/babylon/src/parser/lval.js
index d3d4569611..07e4db70db 100644
--- a/packages/babylon/src/parser/lval.js
+++ b/packages/babylon/src/parser/lval.js
@@ -92,22 +92,17 @@ pp.parseSpread = function (refShorthandDefaultPos) {
 pp.parseRest = function () {
   let node = this.startNode();
   this.next();
-  if (this.match(tt.name) || this.match(tt.bracketL)) {
-    node.argument = this.parseBindingAtom();
-  } else {
-    this.unexpected();
-  }
+  node.argument = this.parseIdentifier();
   return this.finishNode(node, "RestElement");
 };
 
 // Parses lvalue (assignable) atom.
 
 pp.parseBindingAtom = function () {
-  if (this.match(tt.name)) {
-    return this.parseIdentifier(true);
-  }
-
   switch (this.state.type) {
+    case tt.name:
+      return this.parseIdentifier(true);
+
     case tt.bracketL:
       let node = this.startNode();
       this.next();