switch block scoping for in/of var hoisting statements - fixes #2174

packages/babel/src/transformation/transformers/es6/block-scoping.js

@@ -233,8 +233,8 @@ var hoistVarDeclarationsVisitor = {
       }
     } else if (this.isFor()) {
       if (isVar(node.left, node)) {
-        node.left = node.left.declarations[0].id;
         self.pushDeclar(node.left);
+        node.left = node.left.declarations[0].id;
       }
     } else if (isVar(node, parent)) {
       return self.pushDeclar(node).map(t.expressionStatement);

packages/babel/test/fixtures/transformation/es6.block-scoping/issue-2174/actual.js

@@ -0,0 +1,7 @@
+if (true) {
+  function foo() {}
+  function bar() {
+    return foo;
+  }
+  for (var x in {}) {}
+}

packages/babel/test/fixtures/transformation/es6.block-scoping/issue-2174/expected.js

@@ -0,0 +1,15 @@
+"use strict";
+
+if (true) {
+  var x;
+
+  (function () {
+    var foo = function foo() {};
+
+    var bar = function bar() {
+      return foo;
+    };
+
+    for (x in {}) {}
+  })();
+}