  $ dune exec ./version.exe
  Numeric:    1.48.0
  String:     1.48.0
  Hex:        0x013000
  version (): 0x013000
  is_release: true
  suffix:     ""

  $ dune exec ./error.exe
  E2BIG                argument list too long
  EACCES               permission denied
  EADDRINUSE           address already in use
  EADDRNOTAVAIL        address not available
  EAFNOSUPPORT         address family not supported
  EAGAIN               resource temporarily unavailable
  EAI_ADDRFAMILY       address family not supported
  EAI_AGAIN            temporary failure
  EAI_BADFLAGS         bad ai_flags value
  EAI_BADHINTS         invalid value for hints
  EAI_CANCELED         request canceled
  EAI_FAIL             permanent failure
  EAI_FAMILY           ai_family not supported
  EAI_MEMORY           out of memory
  EAI_NODATA           no address
  EAI_NONAME           unknown node or service
  EAI_OVERFLOW         argument buffer overflow
  EAI_PROTOCOL         resolved protocol is unknown
  EAI_SERVICE          service not available for socket type
  EAI_SOCKTYPE         socket type not supported
  EALREADY             connection already in progress
  EBADF                bad file descriptor
  EBUSY                resource busy or locked
  ECANCELED            operation canceled
  ECONNABORTED         software caused connection abort
  ECONNREFUSED         connection refused
  ECONNRESET           connection reset by peer
  EDESTADDRREQ         destination address required
  EEXIST               file already exists
  EFAULT               bad address in system call argument
  EFBIG                file too large
  EFTYPE               inappropriate file type or format
  EHOSTUNREACH         host is unreachable
  EILSEQ               illegal byte sequence
  EINTR                interrupted system call
  EINVAL               invalid argument
  EIO                  i/o error
  EISCONN              socket is already connected
  EISDIR               illegal operation on a directory
  ELOOP                too many symbolic links encountered
  EMFILE               too many open files
  EMLINK               too many links
  EMSGSIZE             message too long
  ENAMETOOLONG         name too long
  ENETDOWN             network is down
  ENETUNREACH          network is unreachable
  ENFILE               file table overflow
  ENOBUFS              no buffer space available
  ENODATA              no data available
  ENODEV               no such device
  ENOENT               no such file or directory
  ENOMEM               not enough memory
  ENONET               machine is not on the network
  ENOPROTOOPT          protocol not available
  ENOSPC               no space left on device
  ENOSYS               function not implemented
  ENOTCONN             socket is not connected
  ENOTDIR              not a directory
  ENOTEMPTY            directory not empty
  ENOTSOCK             socket operation on non-socket
  ENOTSUP              operation not supported on socket
  ENOTTY               inappropriate ioctl for device
  ENXIO                no such device or address
  EOF                  end of file
  EOVERFLOW            value too large for defined data type
  EPERM                operation not permitted
  EPIPE                broken pipe
  EPROTO               protocol error
  EPROTONOSUPPORT      protocol not supported
  EPROTOTYPE           protocol wrong type for socket
  ERANGE               result too large
  EROFS                read-only file system
  ESHUTDOWN            cannot send after transport endpoint shutdown
  ESOCKTNOSUPPORT      socket type not supported
  ESPIPE               invalid seek
  ESRCH                no such process
  ETIMEDOUT            connection timed out
  ETXTBSY              text file is busy
  EUNATCH              protocol driver not attached
  EXDEV                cross-device link not permitted
  UNKNOWN              unknown error
