[fpc-pascal]possible bug in fpc-1.00 (yes, not the newest version)

[Tjabo Kloppenburg]

hi,

I'm using fpc on a linux box (i386). fpc version is
"Free Pascal Compiler version 1.00 [2000/07/11] for i386".

ok, I want to have a simple tool exiting with return code 0 or 1 if a 
substring is in another string or not.

this is the source code:

begin
  if paramcount = 2 then begin
    writeln( pos(paramstr(1), paramstr(0)) );
    writeln( pos(paramstr(0), paramstr(1)) );
  end;
end.

now, when compiling "ppc substr.pas", and starting:
substr IsThisABug u

it writes:
0
0

Am I wrong in thinking that at least one line should have been "-1"?

Best regards,
 Tjabo