error 0
 crypto_aead_decrypt returns nonzero
 ==17696== Memcheck, a memory error detector
 ==17696== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==17696== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info
 ==17696== Command: ./try
 ==17696==
 ==17696==
 ==17696== HEAP SUMMARY:
 ==17696==     in use at exit: 69,760 bytes in 16 blocks
 ==17696==   total heap usage: 22 allocs, 6 frees, 83,704 bytes allocated
 ==17696==
 ==17696== LEAK SUMMARY:
 ==17696==    definitely lost: 0 bytes in 0 blocks
 ==17696==    indirectly lost: 0 bytes in 0 blocks
 ==17696==      possibly lost: 69,760 bytes in 16 blocks
 ==17696==    still reachable: 0 bytes in 0 blocks
 ==17696==         suppressed: 0 bytes in 0 blocks
 ==17696== Rerun with --leak-check=full to see details of leaked memory
 ==17696==
 ==17696== For lists of detected and suppressed errors, rerun with: -s
 ==17696== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)