throws exception when is unable to create temp directory

Author: dg

src/RobotLoader/RobotLoader.php

@@ -365,9 +365,7 @@ public function setAutoRefresh($on = true)
 	 */
 	public function setTempDirectory($dir)
 	{
-		if (!is_dir($dir)) {
-			@mkdir($dir); // @ - directory may already exist
-		}
+		Nette\Utils\FileSystem::createDir($dir);
 		$this->tempDirectory = $dir;
 		return $this;
 	}