From 00996138ba2a283401184d13c73048e7216df706 Mon Sep 17 00:00:00 2001
From: Alistair Brown <github@alistairjcbrown.com>
Date: Mon, 6 Feb 2017 10:34:35 +0000
Subject: [PATCH] Handle promise rejection when using `--open` flag (#780)

---
 bin/webpack-dev-server.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/bin/webpack-dev-server.js b/bin/webpack-dev-server.js
index c5a137e1da..d3352b0aa2 100755
--- a/bin/webpack-dev-server.js
+++ b/bin/webpack-dev-server.js
@@ -434,8 +434,11 @@ function reportReadiness(uri, options) {
 		console.log(`Content not from webpack is served from ${colorInfo(useColor, contentBase)}`);
 	if(options.historyApiFallback)
 		console.log(`404s will fallback to ${colorInfo(useColor, options.historyApiFallback.index || "/index.html")}`);
-	if(options.open)
-		open(uri);
+	if(options.open) {
+		open(uri).catch(function() {
+			console.log("Unable to open browser. If you are running in a headless environment, please do not use the open flag.");
+		});
+	}
 }
 
 processOptions(wpOpt);