[perl #129884] Strange behaviour on "say".

[via RT]

# New Ticket Created by  janko popov 
# Please include the string:  [perl #129884]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=129884 >


Hi,

Maybe this is known bug, maybe not :-) But I cannot finding it on
https://rt.perl.org.
I found very strange behaviour on "say".
If we run code below then the "test" not appeared, but if we uncomment row
#say 'run';
the "test" appeared.

# This is Rakudo version 2016.07.1 built on MoarVM version 2016.07
# implementing Perl 6.c.
# Linux 4.2.0-42-generic #49~14.04.1-Ubuntu SMP Wed Jun 29 20:22:11 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

sub test {
    loop (my $i = 0; $i < 10; ++$i) {
        loop (my $j = 0; $j < 10; ++$j) {
            say 'test';
        }
    }
    #say 'run';
}

test;