Something about the cascade calling of sort() in rakudo.

Hi, I'm new to Perl6. And just ran the first example in the perl6 book.
But, it refused to work. It complains as follows:

Too many positional parameters passed; got 2 but expected between 0 and 1

I find out that the problem is in the line:

my @sorted = @names.sort({ %sets{$_} }).sort({ %games{$_} }).reverse;

And I tried eliminate the second sort, or just the parameters in the
second sort. In both cases, it works.

So, why is this happen? Can it be a bug?

Sorry for my poor English. Hope you all understand what I'm trying to say.

• Something about the cascade calling of sort() in rakudo. by Hongwen Qiu
• Re: Something about the cascade calling of sort() in rakudo. by Moritz Lenz
• Re: Something about the cascade calling of sort() in rakudo. by Solomon Foster