[perl #129817] (De)serialization of state variables is not implemented.

[via RT]

# New Ticket Created by  Paweł Murias 
# Please include the string:  [perl #129817]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=129817 >


The contents of state variables is not preserved when serializing closures.
Bug is present b3c92baad264146f9e7dd7308f3064c3d7e18be2 and has been
implemented this way.

### Foo.pm
use v6;
# works when you turn precompilation off
#no precompilation;
module Foo {
    my $closure = BEGIN {
        say("compiling");
        my $c := -> {
            state $foo = 100;
            $foo++;
            $foo;
        };
        $c();
        $c();
        $c();
        $c;
    }
    sub foo is export {
        $closure();
    }
}

### foo.p6
use Foo;
say(foo);