1 files changed, 8 insertions, 5 deletions
diff --git a/lib/private/Files/Cache/Wrapper/CacheJail.php b/lib/private/Files/Cache/Wrapper/CacheJail.php
index 5c7bd4334f3..5bc4ee8529d 100644
--- a/lib/private/Files/Cache/Wrapper/CacheJail.php
+++ b/lib/private/Files/Cache/Wrapper/CacheJail.php
@@ -31,10 +31,13 @@ class CacheJail extends CacheWrapper {
 	) {
 		parent::__construct($cache, $dependencies);
 
-		if ($cache instanceof CacheJail) {
-			$this->unjailedRoot = $cache->getSourcePath($root);
-		} else {
-			$this->unjailedRoot = $root;
+		$this->unjailedRoot = $root;
+		$parent = $cache;
+		while ($parent instanceof CacheWrapper) {
+			if ($parent instanceof CacheJail) {
+				$this->unjailedRoot = $parent->getSourcePath($this->unjailedRoot);
+			}
+			$parent = $parent->getCache();
 		}
 	}
 
@@ -50,7 +53,7 @@ class CacheJail extends CacheWrapper {
 	 *
 	 * @return string
 	 */
-	protected function getGetUnjailedRoot() {
+	public function getGetUnjailedRoot() {
 		return $this->unjailedRoot;
 	}