[perl #127879] [BUG] map subroutine ignores the sequence in the specific case

[Zoffix Znet via RT]

Re-opening per TimToady's comments: 
http://irclog.perlgeek.de/perl6/2016-07-21#i_12881470

The map de-lazifies when sunk, but in this case the for's sinking doesn't seem 
to propagate to the map.

This, for example, prints all the values:

m: for ^3 { ^10 .map: *.say; Nil }; say 42;

-- 
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ZZ | https://twitter.com/zoffix