From 0d20d422cee194569ba423630c9bc8e2ef2e931b Mon Sep 17 00:00:00 2001
From: Jonathan Rainville <rainville.jonathan@gmail.com>
Date: Mon, 30 Apr 2018 09:29:31 -0400
Subject: [PATCH] hotfix for watch not defined

---
 lib/core/engine.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/core/engine.js b/lib/core/engine.js
index a39ec5e50..bfdca869f 100644
--- a/lib/core/engine.js
+++ b/lib/core/engine.js
@@ -146,7 +146,9 @@ class Engine {
         self.currentAbi = abi;
         self.contractsJSON = contractsJSON;
         pipeline.build(abi, contractsJSON, null, function() {
-          self.watch.restart(); // Necessary because changing a file while it is writing can stop it from being watched
+          if (self.watch) {
+            self.watch.restart(); // Necessary because changing a file while it is writing can stop it from being watched
+          }
           self.events.emit('outputDone');
         });
       });