catch and log exception in OC_Helper::cleanTmp()

lib/private/helper.php

@@ -644,15 +644,33 @@ class OC_Helper {
 		if (file_exists($leftoversFile)) {
 			$leftovers = file($leftoversFile);
 			foreach ($leftovers as $file) {
-				self::rmdirr($file);
+				try {
+					self::rmdirr($file);
+				} catch (UnexpectedValueException $ex) {
+					// not really much we can do here anymore
+					if (!is_null(\OC::$server)) {
+						$message = $ex->getMessage();
+						\OC::$server->getLogger()->error("Error deleting file/folder: $file - Reason: $message",
+							array('app' => 'core'));
+					}
+				}
 			}
 			unlink($leftoversFile);
 		}
 
 		foreach (self::$tmpFiles as $file) {
 			if (file_exists($file)) {
-				if (!self::rmdirr($file)) {
-					file_put_contents($leftoversFile, $file . "\n", FILE_APPEND);
+				try {
+					if (!self::rmdirr($file)) {
+						file_put_contents($leftoversFile, $file . "\n", FILE_APPEND);
+					}
+				} catch (UnexpectedValueException $ex) {
+					// not really much we can do here anymore
+					if (!is_null(\OC::$server)) {
+						$message = $ex->getMessage();
+						\OC::$server->getLogger()->error("Error deleting file/folder: $file - Reason: $message",
+							array('app' => 'core'));
+					}
 				}
 			}
 		}