From 62a40036d0a75b1ef063707205aa7da501c98cf6 Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Fri, 16 Nov 2018 15:17:57 +1030
Subject: [PATCH] Fix empty JS files not actually being empty

---
 src/Frontend/Compiler/JsCompiler.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Frontend/Compiler/JsCompiler.php b/src/Frontend/Compiler/JsCompiler.php
index b86a42044..79f1a3df1 100644
--- a/src/Frontend/Compiler/JsCompiler.php
+++ b/src/Frontend/Compiler/JsCompiler.php
@@ -21,6 +21,10 @@ class JsCompiler extends RevisionCompiler
      */
     protected function save(string $file, array $sources): bool
     {
+        if (empty($sources)) {
+            return false;
+        }
+
         $mapFile = $file.'.map';
 
         $map = new SourceMap();