[Nickle] Bugs using // with large negative dividend

Carl Worth nickle@nickle.org
Fri, 13 Dec 2002 11:11:47 -0500

Here's some more mystic behavior of the // operator.

When the magnitude of a negative dividend exceeds some threshold, the
direction of the rounding changes:

	> a=-200000000;
	> b=-3;
	> a//b
	> 10*a//b

	> a=-200000000;
	> b=3
	> a//b
	> 10*a//b

Positive dividends do not appear to tickle the bug.

Also, results yielding a fractional part less than 0.5 seem to be
unaffected as well.


PS. I don't know whether my attempt to validate the trapezoid
implementation using nickle is finding more bugs in the trapezoid code
or in nickle. ;-)