Array attributes silently don't work

[moritz]

class A {
    has @!x;
    method pushx($a) {
        pir::push(@!x, $a);
        say(pir::join('|', @!x));
    }
}

A.new.pushx('42');

# output: an empty line. Should be 42\n, IMHO

That's the same both in master and nom branch. Needs fixing :-)

[jnthn]

Also needs fixing in nqpclr.

This will ultimately depend on whether the underlying object model automatically binds @!x of self to an array object of some sort when a new instance is created (or first accessed). NQP cannot really force it to happen as part of scope initialization, like it can for local variables.

Pm