Why does errcheck fail when method is assigned to variable?

[m-kru]

I have created simple reproducer.

package main

import (
	"fmt"
	"strings"
)

func main() {
	b := strings.Builder{}
	bws := b.WriteString
	bws("Lorem ipsum ...\n")
	fmt.Printf(b.String())
}

[user@host errcheck]$ errcheck main.go
main.go:11:5:	bws("Lorem ipsum ...\n")
[user@host errcheck]$ echo $?
1

[kisielk]

errcheck does not have a way to know the name of the function that was assigned to the variable bws, so it cannot ignore the call.

[m-kru]

@kisielk shouldn't it then either be improved or shouldn't it ignore this check? Right now it falsely fails and breaks the CI.

[kisielk]

You can assign the result to _ to silence the error and make it explicitly ignored.