[perl #130462] [BUG] Unknown QAST node type NQPMu error when using `is tighter`

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# New Ticket Created by  Zoffix Znet 
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notviki m: sub postfix:<F> (Rat $r --> FatRat) is tighter(&infix:<==>) { 
FatRat.new: .numerator, .denominator }; say <0/0>F == <1/0>F
camelia rakudo-moar 87fefa: OUTPUT«===SORRY!===␤Unknown QAST node type NQPMu␤»