From 7dbde208effdfb663c750343044d8a32b813a89c Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Thu, 21 May 2015 18:43:55 +0100
Subject: [PATCH] spec.functionName transformer: hasBinding(name) returns
 `true` for built-in globals, so we attempt to rename the binding but it
 doesn't exist so exits early, add a check that doesn't perform the renaming
 and instead uses the wrapper - fixes #1598

---
 src/babel/transformation/helpers/name-method.js |  2 +-
 .../spec.function-name/global/actual.js         |  5 +++++
 .../spec.function-name/global/expected.js       | 17 +++++++++++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 test/core/fixtures/transformation/spec.function-name/global/actual.js
 create mode 100644 test/core/fixtures/transformation/spec.function-name/global/expected.js

diff --git a/src/babel/transformation/helpers/name-method.js b/src/babel/transformation/helpers/name-method.js
index 508f135c5a..97af78f66b 100644
--- a/src/babel/transformation/helpers/name-method.js
+++ b/src/babel/transformation/helpers/name-method.js
@@ -20,7 +20,7 @@ var visitor = {
 
 var wrap = function (state, method, id, scope) {
   if (state.selfReference) {
-    if (scope.hasBinding(id.name)) {
+    if (scope.hasBinding(id.name) && !scope.hasGlobal(id.name)) {
       // we can just munge the local binding
       scope.rename(id.name);
     } else {
diff --git a/test/core/fixtures/transformation/spec.function-name/global/actual.js b/test/core/fixtures/transformation/spec.function-name/global/actual.js
new file mode 100644
index 0000000000..abd0e6f67b
--- /dev/null
+++ b/test/core/fixtures/transformation/spec.function-name/global/actual.js
@@ -0,0 +1,5 @@
+var test = {
+  setInterval: function(fn, ms) {
+    setInterval(fn, ms);
+  }
+};
diff --git a/test/core/fixtures/transformation/spec.function-name/global/expected.js b/test/core/fixtures/transformation/spec.function-name/global/expected.js
new file mode 100644
index 0000000000..fc059a98e6
--- /dev/null
+++ b/test/core/fixtures/transformation/spec.function-name/global/expected.js
@@ -0,0 +1,17 @@
+"use strict";
+
+var test = {
+  setInterval: (function (_setInterval) {
+    function setInterval(_x, _x2) {
+      return _setInterval.apply(this, arguments);
+    }
+
+    setInterval.toString = function () {
+      return _setInterval.toString();
+    };
+
+    return setInterval;
+  })(function (fn, ms) {
+    setInterval(fn, ms);
+  })
+};