error 0
 crypto_aead_decrypt returns nonzero
 ==1111== Memcheck, a memory error detector
 ==1111== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==1111== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info
 ==1111== Command: ./try
 ==1111==
 ==1111==
 ==1111== HEAP SUMMARY:
 ==1111==     in use at exit: 200,704 bytes in 16 blocks
 ==1111==   total heap usage: 22 allocs, 6 frees, 214,648 bytes allocated
 ==1111==
 ==1111== LEAK SUMMARY:
 ==1111==    definitely lost: 0 bytes in 0 blocks
 ==1111==    indirectly lost: 0 bytes in 0 blocks
 ==1111==      possibly lost: 200,704 bytes in 16 blocks
 ==1111==    still reachable: 0 bytes in 0 blocks
 ==1111==         suppressed: 0 bytes in 0 blocks
 ==1111== Rerun with --leak-check=full to see details of leaked memory
 ==1111==
 ==1111== For lists of detected and suppressed errors, rerun with: -s
 ==1111== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)