handle top-level blocks – fixes #326

src/ast/attachScopes.js

@@ -44,7 +44,7 @@ export default function attachScopes ( statement ) {
 			}
 
 			// create new block scope
-			if ( node.type === 'BlockStatement' && !/Function/.test( parent.type ) ) {
+			if ( node.type === 'BlockStatement' && ( !parent || !/Function/.test( parent.type ) ) ) {
 				newScope = new Scope({
 					parent: scope,
 					block: true

test/function/top-level-block/_config.js

@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'allows top-level block'
+};

test/function/top-level-block/main.js

@@ -0,0 +1,3 @@
+{
+	assert.equal( 1 + 1, 2 );
+}