ensure BlockStatement when we're going to be pushing nodes

lib/6to5/transformers/destructuring.js

@@ -79,6 +79,8 @@ exports.ForOfStatement = function (node, parent, opts, generateUid) {
 
   push(declar.kind, nodes, pattern, key);
 
+  util.ensureBlock(node);
+
   var block = node.body;
   block.body = nodes.concat(block.body);
 };

lib/6to5/transformers/for-of.js

@@ -20,6 +20,8 @@ exports.ForOfStatement = function (node, parent, opts, generateUid) {
     KEY:          key
   });
 
+  util.ensureBlock(node);
+
   var block = node2.body;
   block.body = block.body.concat(node.body.body || []);
 

lib/6to5/util.js

@@ -41,6 +41,13 @@ exports.parse = function (filename, code, callback, opts) {
   }
 };
 
+exports.ensureBlock = function (node) {
+  var block = node.body;
+  if (block.type === "BlockStatement") return;
+
+  node.body = [node.body];
+};
+
 exports.isPattern = function (node) {
   return node.type === "ArrayPattern" || node.type === "ObjectPattern";
 };

package.json

@@ -1,7 +1,7 @@
 {
   "name": "6to5",
   "description": "Turn ES6 code into vanilla ES5 with source maps and no runtime",
-  "version": "1.5.4",
+  "version": "1.5.5",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://github.com/sebmck/6to5",
   "repository": {