[clean-list] bug in printing sin(pi/2.0)

[Peter Achten]

  Hi John,

The following programs gives unexpected output:

===================
module tt

import StdEnv

Start = sin (pi / 2.0) - 1.0

pi = 3.1415926
===================

tested on Windows, 32bit, Clean 2.2. Apparantly occurs also on Windows, 64bit, Clean 2.2.