null users dont exist

Signed-off-by: Robin Appelman <robin@icewind.nl>

diff --git a/lib/private/User/Manager.php b/lib/private/User/Manager.php
index c04f426c2cf6e33de82c6586cfd844dd95d6c9b0..ded807a223ba22abff5075fca23d00aa3e0edc7f 100644 (file)
--- a/lib/private/User/Manager.php
+++ b/lib/private/User/Manager.php
@@ -126,6 +126,9 @@ class Manager extends PublicEmitter implements IUserManager {
         * @return \OC\User\User|null Either the user or null if the specified user does not exist
         */
        public function get($uid) {
+               if (is_null($uid) || $uid === '' || $uid === false) {
+                       return null;
+               }
                if (isset($this->cachedUsers[$uid])) { //check the cache first to prevent having to loop over the backends
                        return $this->cachedUsers[$uid];
                }