program t38;
(* TP3 refuses a boolean I/O with error 66 ("I/O not allowed here",
   TPSRC8 prderrtp) and its runtime has no boolean reader at all -- xrdreal,
   xrdchar, xrdint and xrdbyte exist; xrdbool does not.  A BOOLEAN is one
   byte, so an accepted read would be a two-byte store into it, and the
   second of those bytes is the byte that follows the variable.

   The position pinned in expected.tsv is the ')' after b: IoCall has parsed
   the whole argument, and the atom parser has already skipped the whitespace
   after it, so the parser stands on the ')' when IoCall dispatches on the
   variable's class. *)
var
  b : boolean;
begin
  readln (b)
end.