From 163a30728b5d53b767b05b1d4f6c57116bb737bc Mon Sep 17 00:00:00 2001
From: Ben Gourley <bn@grly.me>
Date: Mon, 8 Jan 2018 18:24:20 +0000
Subject: [PATCH] Prevent duplicate log for undelivered error, fixes #123

---
 lib/bugsnag.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/bugsnag.js b/lib/bugsnag.js
index 7b13a97..02f2050 100644
--- a/lib/bugsnag.js
+++ b/lib/bugsnag.js
@@ -66,8 +66,12 @@ function autoNotifyCallback(notifiedError, uncaughtError) {
                     errorMsg.push("configuration options prevent the following error from being sent to Bugsnag.");
                     errorMsg.push("https://docs.bugsnag.com/platforms/nodejs/other/configuration-options/#notifyreleasestages");
                 }
-                errorMsg.push("");
-                errorMsg.push(notifiedError.stack);
+                // only print caught errors at this point. uncaught errors get printed by
+                // the onUncaughtError function later so this prevents duplicate logs
+                if (!(Configuration.onUncaughtError && uncaughtError)) {
+                  errorMsg.push("");
+                  errorMsg.push(notifiedError.stack);
+                }
             }
             errorMsg.push("");
             Configuration.logger.error(errorMsg.join('\n'));