type is not the same as an initialized but empty value of the same type.
Consequently, taking the address of an empty slice or map composite literal
does not have the same effect as allocating a new slice or map value with
<a href="#Allocation">new</a>.
</p>

<pre>
p1 := &amp;[]int{}    // p1 points to an initialized, empty slice with value []int{} and length 0