You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: a.go
    path of file: ./repos/cockroach/pkg/testutils/lint/passes/nilness/testdata/src/a
    
    the code of the file until where you have to start completion: // Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Portions of this file are additionally subject to the following
// license and copyright.
//
// Copyright 2021 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the
    
func f2(ptr *[3]int, i interface{}) {
	if ptr != nil {
		print(ptr[:])
		*ptr = [3]int{}
		print(*ptr)
	} else {
		print(ptr[:])   // want "nil dereference in slice operation"
		*ptr = [3]int{} // want "nil dereference in store"
		print(*ptr)     // want "nil dereference in load"

		if ptr != nil { // want "impossible condition: nil != nil"
			// Dominated by ptr==nil and ptr!=nil,
			// this block is unreachable.
			// We do not report errors within it.
			print(*ptr)
		}
	}

	if i != nil {
		print(i.(interface{ f() }))
	} else {
		print(i.(interface{ f() })) // want "nil dereference in type assertion"
	}
}