From 74d93269da6182023e35c8d4ddf7bd5aba9b4309 Mon Sep 17 00:00:00 2001
From: Michael Vogel <icarus@dabo.de>
Date: Fri, 23 Aug 2019 07:19:08 +0200
Subject: [PATCH] Prevent a fatal error for an empty parameter in "unparseURL"

---
 src/Content/Text/HTML.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Content/Text/HTML.php b/src/Content/Text/HTML.php
index c8bed0b9d6..ddc587d72a 100644
--- a/src/Content/Text/HTML.php
+++ b/src/Content/Text/HTML.php
@@ -419,6 +419,10 @@ class HTML
 		$link = $matches[0];
 		$url = $matches[1];
 
+		if (empty($url) || empty(parse_url($url))) {
+			return $matches[0];
+		}
+
 		$parts = array_merge($base, parse_url($url));
 		$url2 = Network::unparseURL($parts);