PROC O (VAL INT val1, val2, VAL []INT varray, INT abbr, []INT array, CHAN OF INT channel)
  SKIP
:
PROC P (VAL INT val1, val2, VAL []INT varray, INT abbr, []INT array, CHAN OF INT channel)
  O (val1, val2, varray, abbr, array, channel)
:
PROC Q ()
  INT x, y:
  [10]INT xs, ys:
  CHAN OF INT c:
  P (42, x, xs, y, ys, c)
: