False Positive when error is not returned from function

[QianKuang8]

Case 1 use switch and case 2 use if. Both of them are failed.

package main

import "fmt"

// not OK
func case1() {
	var s *string
	var err error
	situation := 1
	switch situation {
	case 1:
		tmp := "one"
		s = &tmp
	default:
		err = fmt.Errorf("error")
	}
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(*s)
}

// not OK
func case2() {
	var s *string
	var err error
	situation := 1
	if situation == 1 {
		tmp := "one"
		s = &tmp
	} else {
		err = fmt.Errorf("error")
	}
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(*s)
}

func main() {
	case1()
	case2()
}

I check the issues and this is similar to #110 but more simple with a bit different.