Using Emmet with $, @ and attributes

Question

I'm using phpstorm 2018.2. This is my snippet that seems well formed to me but doesn't expand:

select[name=qtyPotatoes id==qtyPotatoes]>option.item$[value=$]@3*5

I just tried it on emmet.io. She expanded it, but didn't respect the @3.

These two related snippets do expand properly

select[name=qtyPotatoes id==qtyPotatoes]>option.item$@3*5

select[name=qtyPotatoes id==qtyPotatoes]>option.item$[value=$]*5

I am trying to get this code:

<select name="qtyPotatoes" id="=qtyPotatoes">
    <option value="3" class="item3"></option>
    <option value="4" class="item4"></option>
    <option value="5" class="item5"></option>
    <option value="6" class="item6"></option>
    <option value="7" class="item7"></option>
</select>