Issue 14373: Avoid exception in BBCode parser

diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index 4f1d881381233ac84ec9ec595bf4d71041555378..003f7ab4028bc442483fdc1faa4b611a84a86652 100644 (file)
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -814,7 +814,7 @@ class BBCode
 
                                $content = preg_replace(Strings::autoLinkRegEx(), '<a href="$1">$1</a>', $match[3]);
 
-                               return $match[1] . $callback($attributes, $author_contact, $content, trim($match[1]) != '');
+                               return $match[1] . $callback($attributes, $author_contact, $content ?? '', trim($match[1]) != '');
                        },
                        $text
                );