From 623c2307256c68093407ffcff9cc37e544ca9a14 Mon Sep 17 00:00:00 2001
From: Roman Zimmermann <roman@more-onion.com>
Date: Mon, 11 Dec 2023 13:55:03 +0100
Subject: [PATCH] fix: No custom attributes for script without src attribute

---
 theming.module | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/theming.module b/theming.module
index 0ff2800..64ec2d3 100644
--- a/theming.module
+++ b/theming.module
@@ -50,8 +50,10 @@ function theming_pre_render_scripts(array $elements) {
       continue;
     }
     $attributes = &$processed_elements['scripts'][$index]['#attributes'];
-    $custom_attributes = $elements['#items'][$attributes['src']]['attributes'] ?? [];
-    $attributes = $custom_attributes + $attributes;
+    if ($src = $attributes['src'] ?? NULL) {
+      $custom_attributes = $elements['#items'][$src]['attributes'] ?? [];
+      $attributes = $custom_attributes + $attributes;
+    }
   }
   return $processed_elements;
 }