SmtpMailer: $error may not be filled

https://forum.nette.org/cs/30331-posielanie-emailu-chyba-nette-mail-smtpexception

src/Mail/SmtpMailer.php

@@ -135,7 +135,7 @@ protected function connect()
 			$errno, $error, $this->timeout, STREAM_CLIENT_CONNECT, $this->context
 		);
 		if (!$this->connection) {
-			throw new SmtpException($error, $errno);
+			throw new SmtpException($error ?: error_get_last()['message'], $errno);
 		}
 		stream_set_timeout($this->connection, $this->timeout, 0);
 		$this->read(); // greeting