From @AlexDaniel

Code​:
my @​a[2;2]; say @​a.List

Result (2015.12,2016.06)​:
((Any) (Any) (Any) (Any))

Result (2016.07.1,HEAD)​:
Cannot access 2 dimension array with 1 indices
  in block <unit> at /tmp/8Bs1nJFDSo line 1

Bisectable points to rakudo/rakudo@e990823

Maybe it is not supposed to work, but the commit message does not mention that. Therefore I am assuming that the change was unintentional.

From @lizmat

Fixed with 8568dd1, tests needed

On 5 Jan 2017, at 05​:35, Aleks-Daniel Jakimenko-Aleksejev (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by Aleks-Daniel Jakimenko-Aleksejev
# Please include the string​: [perl #​130513]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=130513 >

Code​:
my @​a[2;2]; say @​a.List

Result (2015.12,2016.06)​:
((Any) (Any) (Any) (Any))

Result (2016.07.1,HEAD)​:
Cannot access 2 dimension array with 1 indices
in block <unit> at /tmp/8Bs1nJFDSo line 1

Bisectable points to rakudo/rakudo@e990823

Maybe it is not supposed to work, but the commit message does not mention that. Therefore I am assuming that the change was unintentional.

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

From @zoffixznet

Tests in Raku/roast@1c61263ca4

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