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: issue36437.go
    path of file: ./repos/gccrs/gcc/testsuite/go.test/test/fixedbugs
    
    the code of the file until where you have to start completion: // run

// +build !nacl,!js,gc

// Copyright 2020 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.

// Tests that when non-existent files are passed to the
// compiler, such as in:
//    go tool compile foo
// we don't print the beginning position:
//    foo:0: open foo: no such f
    
func main() {
	tmpDir, err := ioutil.TempDir("", "issue36437")
	if err != nil {
		panic(err)
	}
	defer os.RemoveAll(tmpDir)

	msgOrErr := func(msg []byte, err error) string {
		if len(msg) == 0 && err != nil {
			return err.Error()
		}
		return string(msg)
	}

	filename := "non-existent.go"
	output, err := exec.Command("go", "tool", "compile", filename).CombinedOutput()
	got := msgOrErr(output, err)

	regFilenamePos := regexp.MustCompile(filename + ":\\d+")
	if regFilenamePos.MatchString(got) {
		fmt.Printf("Error message must not contain filename:pos, but got:\n%q\n", got)
	}
}