From 9c049f7ecc35e4c16c1ef717e5f07f17ebdc50dd Mon Sep 17 00:00:00 2001
From: Andy Postnikov <apostnikov@gmail.com>
Date: Thu, 7 Jul 2022 21:27:26 +0200
Subject: [PATCH] Fix preg_match() usage when looking for extension type

https://www.php.net/manual/en/splfileobject.fgets.php may return False
---
 src/Drupal/ExtensionDiscovery.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/Drupal/ExtensionDiscovery.php b/src/Drupal/ExtensionDiscovery.php
index 483f08d2..33017600 100644
--- a/src/Drupal/ExtensionDiscovery.php
+++ b/src/Drupal/ExtensionDiscovery.php
@@ -377,9 +377,11 @@ protected function scanDirectory($dir): array
             $type = false;
             $file = $fileinfo->openFile('r');
             while (!$type && !$file->eof()) {
-                preg_match('@^type:\s*(\'|")?(\w+)\1?\s*$@', $file->fgets(), $matches);
-                if (isset($matches[2])) {
-                    $type = $matches[2];
+                if ($line = $file->fgets()) {
+                    preg_match('@^type:\s*(\'|")?(\w+)\1?\s*$@', $line, $matches);
+                    if (isset($matches[2])) {
+                        $type = $matches[2];
+                    }
                 }
             }
             if ($type === false) {