From 8f724121a28e54343ee4c8e4fb97126006480b2d Mon Sep 17 00:00:00 2001
From: Dmitry Cheryasov <dmitry.cheryasov@gmail.com>
Date: Mon, 20 May 2019 15:36:15 -0500
Subject: [PATCH] Fix a TypeError loading a non-existent proto file.

The issue: https://github.com/grpc/grpc-node/issues/876

This is an obvious typo; `typeof` has to return a string `'undefined'`, not a literal `undefined.`
---
 packages/proto-loader/src/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/proto-loader/src/index.ts b/packages/proto-loader/src/index.ts
index 563f58f57..4e17719ef 100644
--- a/packages/proto-loader/src/index.ts
+++ b/packages/proto-loader/src/index.ts
@@ -121,7 +121,7 @@ function getAllHandledReflectionObjects(
   if (isHandledReflectionObject(obj)) {
     return [[objName, obj]];
   } else {
-    if (isNamespaceBase(obj) && typeof obj.nested !== undefined) {
+    if (isNamespaceBase(obj) && typeof obj.nested !== 'undefined') {
       return Object.keys(obj.nested!)
           .map((name) => {
             return getAllHandledReflectionObjects(obj.nested![name], objName);