From 9a77a7dbaadebbf1d6f6f176f64870f1fe3148ff Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 2 Mar 2015 12:25:08 +1100
Subject: [PATCH] ensure function expression body is a block statement - fixes
 babel/babel-eslint#20

---
 eslint/babel-eslint-parser/acorn-to-esprima.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/eslint/babel-eslint-parser/acorn-to-esprima.js b/eslint/babel-eslint-parser/acorn-to-esprima.js
index a7df3060d2..b8e8540a9e 100644
--- a/eslint/babel-eslint-parser/acorn-to-esprima.js
+++ b/eslint/babel-eslint-parser/acorn-to-esprima.js
@@ -45,11 +45,6 @@ var astTransformVisitor = {
       delete node.name;
     }
 
-    if (t.isFunction(node) && node.async) {
-      node.generator = true;
-      node.async - false;
-    }
-
     if (t.isAwaitExpression(node)) {
       node.type = "YieldExpression";
     }
@@ -98,6 +93,16 @@ var astTransformVisitor = {
 
     if (t.isArrowFunctionExpression(node)) {
       node.type = "FunctionExpression";
+      if (node.body.type !== "BlockStatement") {
+        node.body = t.inherits(t.blockStatement([
+          node.body
+        ]), node);
+      }
+    }
+
+    if (t.isFunction(node) && node.async) {
+      node.generator = true;
+      node.async - false;
     }
   }
 };