From 56862685e09b62402e0428e7fac0e0b8fd31629c Mon Sep 17 00:00:00 2001
From: Michael Giambalvo <heathkit@google.com>
Date: Mon, 31 Oct 2016 11:05:12 -0700
Subject: [PATCH] fix(util): Fix adding stack traces to Errors thrown as
 strings

---
 lib/util.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/util.ts b/lib/util.ts
index f3bafa9d2..e43bb1ed2 100644
--- a/lib/util.ts
+++ b/lib/util.ts
@@ -53,7 +53,7 @@ export function runFilenameOrFn_(
           err = new Error(err);
         } else {
           err = err as Error;
-          if (err.stack) {
+          if (!err.stack) {
             err.stack = new Error().stack;
           }
         }