error 0
 crypto_sign does not handle m=c overlap
 ==8522== Memcheck, a memory error detector
 ==8522== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==8522== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info
 ==8522== Command: ./try
 ==8522==
 ==8522==
 ==8522== HEAP SUMMARY:
 ==8522==     in use at exit: 1,261,690 bytes in 10 blocks
 ==8522==   total heap usage: 15,856 allocs, 15,846 frees, 3,386,440 bytes allocated
 ==8522==
 ==8522== LEAK SUMMARY:
 ==8522==    definitely lost: 0 bytes in 0 blocks
 ==8522==    indirectly lost: 0 bytes in 0 blocks
 ==8522==      possibly lost: 1,261,690 bytes in 10 blocks
 ==8522==    still reachable: 0 bytes in 0 blocks
 ==8522==         suppressed: 0 bytes in 0 blocks
 ==8522== Rerun with --leak-check=full to see details of leaked memory
 ==8522==
 ==8522== For lists of detected and suppressed errors, rerun with: -s
 ==8522== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)