[perl #132549] Can't put() any(): This type cannot unbox to a native string

[brian d foy]

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This comes from an answer to a Perl 6 question on Stackoverflow that
showed a different bug:

    https://stackoverflow.com/q/45527881/2766176

With put() it does not and gives a strange error:

    $ perl6 -e 'put any( 1, 3, 7 ) '
    This type cannot unbox to a native string: P6opaque, Junction
      in block <unit> at -e line 1

    $ perl6 -e 'put( any( 1, 3, 7 )  )'
    This type cannot unbox to a native string: P6opaque, Junction
      in block <unit> at -e line 1

With say it has no problem:

    $ perl6 -e 'say any( 1, 3, 7 )'
    any(1, 3, 7)
    $ perl6 -e 'put any( 1, 3, 7 ).gist'
    any(1, 3, 7)

I'd expect anything that can .gist would be able to .Str.

This is Rakudo 2017.10 on macOS 10.13.