[perl #114696] [BUG] $_ variable disappears after Rakudo sees block in for @array -> $variable {}

[via RT]

# New Ticket Created by  GlitchMr 
# Please include the string:  [perl #114696]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=114696 >


Following code:

    $_ = 'Moo';
    for .chars ... 1 -> $len {
        .perl.say;
        {
            .perl.say;
        }
    }

Should return:

    "Moo"
    "Moo"

But returns:

    "Moo"
    Mu