if len(b) != 0 {
		t.Logf("## build output:\n%s", b)
	}
	if err != nil {
		t.Fatalf("build error: %v", err)
	}
}

func emitFile(t *testing.T, dst, src string) {
	payload, err := os.ReadFile(src)
	if err != nil {
		t.Fatalf("error reading %q: %v", src, err)
	}
	if err := os.WriteFile(dst, payload, 0666); err != nil {
		t.Fatalf("writing %q: %v", dst, err)
	}
}

const mainPkgPath = "prog"

180909 <******@****.***> 1628992653 +0000

Jes Cok <******@****.***> 1706627994 +0000

Dmitri Shuralyov <******@****.***> 1690208770 -0400

// the symbol name and the third field is the ABI name, as one of the
// named cmd/internal/obj.ABI constants.
func (s *SymABIs) ReadSymABIs(file string) {
	data, err := os.ReadFile(file)
	if err != nil {
		log.Fatalf("-symabis: %v", err)
	}

	for lineNum, line := range strings.Split(string(data), "\n") {
		lineNum++ // 1-based
		line = strings.TrimSpace(line)

pkg go/doc, func ToText //deprecated #51082
pkg io/ioutil, func NopCloser //deprecated #42026
pkg io/ioutil, func ReadAll //deprecated #42026
pkg io/ioutil, func ReadDir //deprecated #42026
pkg io/ioutil, func ReadFile //deprecated #42026
pkg io/ioutil, func TempDir //deprecated #42026
pkg io/ioutil, func TempFile //deprecated #42026
pkg io/ioutil, func WriteFile //deprecated #42026

Jonathan Amsterdam <******@****.***> 1705624488 -0500

// comments. We don't want those paths because they are unhelpful for
// the user and make the files change based on details of the location
// of GOPATH.
func checkLineComments(t *testing.T, hdrname string) {
	hdr, err := os.ReadFile(hdrname)
	if err != nil {
		if !os.IsNotExist(err) {
			t.Error(err)
		}
		return
	}
	if line := badLineRegexp.Find(hdr); line != nil {

Alan Donovan <******@****.***> 1711741778 -0400

Russ Cox <******@****.***> 1660679527 -0400