error 0
 crypto_sign does not handle m=c overlap
 ==7245== Memcheck, a memory error detector
 ==7245== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
 ==7245== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info
 ==7245== Command: ./try
 ==7245==
 ==7245==
 ==7245== HEAP SUMMARY:
 ==7245==     in use at exit: 1,261,690 bytes in 10 blocks
 ==7245==   total heap usage: 15,856 allocs, 15,846 frees, 3,386,440 bytes allocated
 ==7245==
 ==7245== LEAK SUMMARY:
 ==7245==    definitely lost: 0 bytes in 0 blocks
 ==7245==    indirectly lost: 0 bytes in 0 blocks
 ==7245==      possibly lost: 1,261,690 bytes in 10 blocks
 ==7245==    still reachable: 0 bytes in 0 blocks
 ==7245==         suppressed: 0 bytes in 0 blocks
 ==7245== Rerun with --leak-check=full to see details of leaked memory
 ==7245==
 ==7245== For lists of detected and suppressed errors, rerun with: -s
 ==7245== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)