Fix5004: incorrect compiled code when a destructuring array contains accessors

[zdenko]

Fixes #5004.

[@all_but_last_two... , @penultimate, @last] = array

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[...this.all_but_last_two] = array, [this.penultimate, this.last] = splice.call(this.all_but_last_two, -2);
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---

[obj.first , obj.middle..., obj.last] = array

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[obj.first, ...obj.middle] = array, [obj.last] = splice.call(obj.middle, -1);
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