This is because the implementation of infix:<cmp>(Rat:D, Rat:D) is kind
of bad:
multi sub infix:<cmp>(Rational:D \a, Rational:D \b) is default {
a.Num cmp b.Num
}
We'll have to do a proper comparison of rats, rather than convert to Num
which can give wrong results like this.
On 23/02/17 04:32, brian d foy (via RT) wrote:
> # New Ticket Created by "brian d foy"
> # Please include the string: [perl #130845]
> # in the subject line of all future correspondence about this issue.
> # <URL: https://rt.perl.org/Ticket/Display.html?id=130845 >
>
>
> Here's a curious change over in precision:
>
> > 4.999999999999999 ~~ 0..^5
> True
> > 4.9999999999999999 ~~ 0..^5
> False
>
> I figure this is an implementation detail that ties to storage, but
> one of the selling points of Perl 6 is that this sort of thing isn't
> a problem anymore.
>
> > $*PERL
> Perl 6 (6.c)
> > $*VM
> moar (2017.01)
