[perl #111674] [BUG] Can't refer to a constant in RHS of the constant declaration in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<masak> nom: constant catalan = 1, map { (4*$_ + 2) / ($_ + 2) *
catalan[$_] }, 0..*; .say for catalan[^10]
<p6eval> rakudo bd6fde: OUTPUT«===SORRY!===␤CHECK FAILED:␤Undefined
routine '&catalan' called (line 1)␤»
<masak> nom: constant k = 1, map { k[$_] }, 0..*; .say for k[^10]
<p6eval> rakudo bd6fde: OUTPUT«===SORRY!===␤CHECK FAILED:␤Undefined
routine '&k' called (line 1)␤»
* masak submits rakudobug
<masak> nom: constant k = k; say k
<p6eval> rakudo bd6fde: OUTPUT«===SORRY!===␤Could not find sub &k␤»
<masak> nom: constant k = 1; constant k2 = k; say k2
<p6eval> rakudo bd6fde: OUTPUT«1␤»