[perl #111720] [BUG] Subtle action-at-a-distance bond broken after seemingly innocent reading operation on array created with Array.new in Rakudo

[Christian Bartolomaeus via RT]

This bug is still present. I added a test (fudged 'todo') to S32-array/pop.t 
with commit https://github.com/perl6/roast/commit/046ad7e7e4