[perl #122080] [BUG] .first-index should take Mu and smart-match against it in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
# Please include the string:  [perl #122080]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=122080 >


<masak> m: my @a = <a b b>; .splice(.first-index({ $_ eq 'b' }), 1)
given @a; say @a.perl
<camelia> rakudo-moar 1a3706: OUTPUT«Array.new("a", "b")␤»
<masak> \o/
<sergot> nice!
<masak> oh, actually
<masak> m: my @a = <a b b>; .splice(.first-index('b', 1)) given @a; say @a.perl
<camelia> rakudo-moar 1a3706: OUTPUT«Cannot call 'first-index'; none
of these signatures match:␤:(Any: Regex:D $test, *%_)␤:(Any: :D $test,
*%_)␤:(Any: $test, *%_)␤  in block  at /tmp/awYaDbDYFR:1␤␤»
<masak> aww
<masak> clearly .first-index should be able to match on literal things, no?
<masak> .grep and .first certainly do.
<moritz> yes, it should take Mu and smart-match against it
* masak submits rakudobug