6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-plugin-transform-es2015-arrow-functions/src/index.js

@@ -3,24 +3,27 @@ export default function ({ types: t }) {
     visitor: {
       ArrowFunctionExpression(path, state) {
         if (state.opts.spec) {
-          if (path.node.shadow) return;
-          path.node.shadow = { this: false };
+          let { node } = path;
+          if (node.shadow) return;
 
-          var boundThis = t.thisExpression();
+          node.shadow = { this: false };
+          node.type = "FunctionExpression";
+
+          let boundThis = t.thisExpression();
           boundThis._forceShadow = path;
 
           // make sure that arrow function won't be instantiated
           path.ensureBlock();
           path.get("body").unshiftContainer(
             "body",
-            t.expressionStatement(t.callExpression(state.addHelper("new-arrow-check"), [
+            t.expressionStatement(t.callExpression(state.addHelper("newArrowCheck"), [
               t.thisExpression(),
               boundThis
             ]))
           );
 
           path.replaceWith(t.callExpression(
-            t.memberExpression(path.node, t.identifier("bind")),
+            t.memberExpression(node, t.identifier("bind")),
             [t.thisExpression()]
           ));
         } else {