The zero value (a slice declared with var) is usabe... is missleading (could panic)

[Kristofer D. Davidson]

The suggestion:
"The zero value (a slice declared with var) is usable immediately without make()."
Under "nil is a valid slice" giving example:

// GOOD
var nums []int
if add1 {
nums = append(nums, 1)
}
if add2 {
nums = append(nums, 2)
}

Is not entirely true. In this case it would work only because append creates and returns a new slice. However if you were to do:

var nums []int
nums[0] = 42

It would panic.
So perhaps the wording should somehow clarify this?

[Prashant Varanasi]

The same is true of a slice created with make([]int, 0), so I'm not sure if a nil slice behaving in the same way is unexpected.

To make this more explicit, we can call out that nil is a valid 0 length slice.

[Prashant Varanasi]

It looks like we already call that out,

`nil` is a valid slice of length 0