From @raydiak

from http://irclog.perlgeek.de/perl6/2016-04-27#i_12398550

06​:43 raydiak m​: my %foo; %foo<bar>[*-0] = 42; say %foo.perl;
06​:43 camelia rakudo-moar ce5dc0​: OUTPUT«{​:bar($[Any, 42])}␤»
06​:43 raydiak ^ where did the Any come from?
06​:43 m​: my @​foo; @​foo[*-0] = 42; say @​foo.perl;
06​:43 camelia rakudo-moar ce5dc0​: OUTPUT«[42]␤»
06​:45 raydiak m​: my %foo; %foo<bar>.push​: 42; say %foo.perl;
06​:45 camelia rakudo-moar ce5dc0​: OUTPUT«{​:bar($[42])}␤»
06​:45 masak raydiak​: looks bugly to me
06​:46 raydiak thanks masak, I'll file a report then

From @zoffixznet

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TODO-fudged tests added in Raku/roast@e1e96176cd

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ZZ | https://twitter.com/zoffix

The RT System itself - Status changed from 'new' to 'open'

From @zoffixznet

The problem is unvivified item is an `Any` and Any.cache.elems returns 1, because it's a "1-item list" thing. I tried a blunt-force solution but the impact is rather pervasive and gives ~~11% slowdown​: https://gist.github.com/zoffixznet/8574ee473e590d709d5e0051914249bd

From @lizmat

Fixed with 08ff3db, can be closed.

@zoffixznet - Status changed from 'open' to 'resolved'