[perl #109674] [BUG] /<[]>/, the empty character class, should be synonymous with // but instead fails at parse time in Rakudo

[Carl Mäsak]

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<TimToady> nom: say so 'a' ~~ /<[]>/
<p6eval> nom ce5cca: OUTPUT«===SORRY!===␤StopIteration␤»
<TimToady> std: say so 'a' ~~ /<[]>/
<p6eval> std 48335fc: OUTPUT«ok 00:01 112m␤»
* masak submits rakudobug
<masak> it should simply allow /<[]>/ as meaning, hm, I guess /<!>/ :)