[perl #115310] [BUG] NullPointerException with REPL on attribute with unsupported type

[Christian Bartolomaeus via RT]

This works now:

$ perl6-m -e 'class A { has @.a of int }; my $foo = A.new; $foo.a = 1,2,3; say 
$foo.perl'
A.new(a => array[int].new(1, 2, 3))

Also, there is no NPE with the REPL:

$ echo 'class A { has @.a of int }' | perl6-j
> > 

I added a test to S12-class/attributes.t with commit 
https://github.com/perl6/roast/commit/311b07e6b8

I'm closing this ticket as 'resolved'.