Stop infinit loop on invalid settings css/js file

Don't try to find dirname of false...

Signed-off-by: Joas Schilling <coding@schilljs.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/private/Template/ResourceLocator.php b/lib/private/Template/ResourceLocator.php
index e82a77ba65f..4e733d28f26 100755
--- a/lib/private/Template/ResourceLocator.php
+++ b/lib/private/Template/ResourceLocator.php
@@ -116,6 +116,14 @@ abstract class ResourceLocator {
 	 * @throws ResourceNotFoundException Only thrown when $throw is true and the resource is missing
 	 */
 	protected function append($root, $file, $webRoot = null, $throw = true) {
+
+		if (!is_string($root)) {
+			if ($throw) {
+				throw new ResourceNotFoundException($file, $webRoot);
+			}
+			return;
+		}
+
 		if (!$webRoot) {
 			$tmpRoot = $root;
 			/*