error 0
 ==7732== Memcheck, a memory error detector
 ==7732== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==7732== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info
 ==7732== Command: ./try
 ==7732==
 Alarm clock