NotSame should fail if args are not pointers

[n4nn31355]

It's confusing and error-prone that NotSame checks nothing if any of the values is not a pointer.
Is there a reason for this, or may we consider it a bug that needs an issue?

a := struct{ byte }{}
require.NotSame(t, a, a)   // Doesn't fail
require.NotSame(t, &a, &a) // Fails

[brackendawson]

It's a bug, I've opened #1661