[perl #127062] [BUG] Useless use of "*" in expression ".price * .quantity" in sink context (2015.12 Regression from 2015.11)

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# New Ticket Created by  Andy Weidenbaum 
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Golfed:

<masak> m: my @a = -1, 2, -3; say [+] (.abs + .abs for @a)
<camelia> rakudo-moar 64a61a: OUTPUT«WARNINGS for /tmp/uySpvnhOVb:␤Useless use 
of "+" in expression ".abs + .abs" in sink context (line 1)␤12␤»