fps@mango 03:10:40 ~/.../opt/monero-x86_64-linux-gnu-v0.15.0.5 $ valgrind ./monerod
==18247== Memcheck, a memory error detector
==18247== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==18247== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==18247== Command: ./monerod
==18247==
2020-03-19 14:10:46.972	I Monero 'Carbon Chamaeleon' (v0.15.0.5-release)
2020-03-19 14:10:46.984	I Initializing cryptonote protocol...
2020-03-19 14:10:46.987	I Cryptonote protocol initialized OK
2020-03-19 14:10:47.002	I Initializing core...
2020-03-19 14:10:47.031	I Loading blockchain from folder /home/fps/.bitmonero/lmdb ...
2020-03-19 14:10:47.075	W Failed to open lmdb environment: Invalid argument
2020-03-19 14:10:47.108	E Error opening database: Failed to open lmdb environment: Invalid argument
2020-03-19 14:10:47.129	I Stopping cryptonote protocol...
2020-03-19 14:10:47.130	I Cryptonote protocol stopped successfully
2020-03-19 14:10:47.143	E Exception in main! Failed to initialize core
==18247==
==18247== HEAP SUMMARY:
==18247==     in use at exit: 90,819 bytes in 1,193 blocks
==18247==   total heap usage: 15,106 allocs, 13,913 frees, 7,475,067 bytes allocated
==18247==
==18247== LEAK SUMMARY:
==18247==    definitely lost: 248 bytes in 1 blocks
==18247==    indirectly lost: 0 bytes in 0 blocks
==18247==      possibly lost: 0 bytes in 0 blocks
==18247==    still reachable: 90,571 bytes in 1,192 blocks
==18247==         suppressed: 0 bytes in 0 blocks
==18247== Rerun with --leak-check=full to see details of leaked memory
==18247==
==18247== For counts of detected and suppressed errors, rerun with: -v
==18247== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
1 fps@mango 03:10:47 ~/.../opt/monero-x86_64-linux-gnu-v0.15.0.5 $