From f11cce1d7ceefa7429db0898a9c94430fb36a8c0 Mon Sep 17 00:00:00 2001
From: Logan Smyth <loganfsmyth@gmail.com>
Date: Tue, 26 Sep 2017 13:18:54 -0700
Subject: [PATCH] Avoid exception when instanceof is in anonymous function
 declaration.

---
 packages/babel-plugin-transform-es2015-instanceof/src/index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/babel-plugin-transform-es2015-instanceof/src/index.js b/packages/babel-plugin-transform-es2015-instanceof/src/index.js
index e2ac29e304..9eaa2e7a23 100644
--- a/packages/babel-plugin-transform-es2015-instanceof/src/index.js
+++ b/packages/babel-plugin-transform-es2015-instanceof/src/index.js
@@ -9,6 +9,7 @@ export default function({ types: t }) {
             return (
               (path.isVariableDeclarator() && path.node.id === helper) ||
               (path.isFunctionDeclaration() &&
+                path.node.id &&
                 path.node.id.name === helper.name)
             );
           });