The function LINES does not work as expected in Object-Oriented REXX:
According to the online help, LINES() used on STDIN should return 1 if there
are remaining characters in the stream or 0 if there are no more characters
in the stream (That's also the way it used to work in Classic REXX).
In reality, LINES() always returns 0 if used for STDIN.
[Tested with OBJREXX 6.00 12 Jul 1996]
[Fixed in OBJREXX 6.00 26 Feb 1997 and newer versions (included in WARP
4 Fixpack #6)]
(see also The function CHARS() in Object REXX; see Writing filter programs in REXX for a workaround)