raku - Perl 6 : maxpairs warns about stringification of undefined values

Question

它看起来像 maxpairs不喜欢在具有未定义值的列表上调用:

> my @foo; @foo[2] = 4; say @foo.maxpairs;
Use of uninitialized value of type Any in string context.
Methods .^name, .perl, .gist, or .say can be used to stringify it to something meaningful.
  in block <unit> at <unknown file> line 1

(2 => 4)

max没有同样的问题，似乎只是忽略了未定义的值:

> my @foo; @foo[2] = 4; say @foo.max;
4

同样的错误确实发生在:

> my @foo; @foo[2] = 4; say @foo.pairs.max(*.value)
Use of uninitialized value of type Any in string context.
Methods .^name, .perl, .gist, or .say can be used to stringify it to something meaningful.
  in block <unit> at <unknown file> line 1

2 => 4

因此，似乎只有在使用 max 时才会忽略未定义的值没有过滤器参数。

这是一个错误吗？

Answer 1

由于这看起来像一个错误，我已经修复了它

https://github.com/rakudo/rakudo/commit/7bf7a2c6f83a57713c

这也照顾“minpairs”。