Warning: invalid file descriptor -1 in syscall read()

HEAP SUMMARY:
    in use at exit: ... bytes in ... blocks
  total heap usage: ... allocs, ... frees, ... bytes allocated

For a detailed leak analysis, rerun with: --leak-check=full

For counts of detected and suppressed errors, rerun with: -v
ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)