main.c error

[Paul]

Hello!   This is not a real problem, since it seems to work correctly 
anyway.  But I'm still wondering about it.  If I just execute "rsync" with 
no switches or targets, it prints the usage, then gives an error at the bottom:

rsync error: syntax or usage error (code 1) at main.c(864)

Is this normal, or indicating a bug, or what?  It does this on three 
different systems, so I don't think it is something I did.

Thanks,
Paul