Invalid memory write caused by incorrect upper bound in array_copy

It only crashes in mruby, and can't be made to crash in mruby-engine as max memory possible to extend to is 256M which this requires more.

values = [3,5,8]
test = [1,6]
results,= [1.2]
values.each do |value|
  case value
    when *test
      results << value
    when *test*= results <<=value
  end
end