From da483d63f6b5762792df5a3bb2bb8d89d691b892 Mon Sep 17 00:00:00 2001
From: Matias Griese <matias@trilbymedia.com>
Date: Mon, 19 Nov 2018 12:43:32 +0200
Subject: [PATCH] Flex: Fixed a bug if there's no entries in the index

---
 system/src/Grav/Framework/Flex/FlexIndex.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/system/src/Grav/Framework/Flex/FlexIndex.php b/system/src/Grav/Framework/Flex/FlexIndex.php
index 4ab2d1add..731f55489 100644
--- a/system/src/Grav/Framework/Flex/FlexIndex.php
+++ b/system/src/Grav/Framework/Flex/FlexIndex.php
@@ -70,7 +70,8 @@ class FlexIndex extends ObjectIndex implements FlexCollectionInterface, FlexInde
     {
         parent::__construct($entries);
 
-        $keys = array_keys(reset($entries));
+        $first = reset($entries);
+        $keys = $first ? array_keys($first) : [];
         $keys = array_combine($keys, $keys) + ['key' => 'key', 'flex_key' => 'flex_key'];
 
         $this->_flexDirectory = $flexDirectory;