{&errorUncomparable{}, err1, false},
		{multiErr{}, err1, false},
		{multiErr{err1, err3}, err1, true},
		{multiErr{err3, err1}, err1, true},
		{multiErr{err1, err3}, errors.New("x"), false},
		{multiErr{err3, errb}, errb, true},
		{multiErr{err3, errb}, erra, true},
		{multiErr{err3, errb}, err1, true},
		{multiErr{errb, err3}, err1, true},
		{multiErr{poser}, err1, true},
		{multiErr{poser}, err3, true},

	for n, ct := range conversionTests() {
		err := convertAssign(ct.d, ct.s)
		errstr := ""
		if err != nil {
			errstr = err.Error()
		}
		errf := func(format string, args ...any) {
			base := fmt.Sprintf("convertAssign #%d: for %v (%T) -> %T, ", n, ct.s, ct.s, ct.d)
			t.Errorf(base+format, args...)
		}
		if errstr != ct.wanterr {
			errf("got error %q, want error %q", errstr, ct.wanterr)
		}

	// override GOTRACEBACK=crash from the user.
	SetTracebackEnv("system")
}

var errf error

func errfn() error {
	return errf
}

func errfn1() error {
	return io.EOF
}

func BenchmarkIfaceCmp100(b *testing.B) {
	for i := 0; i < b.N; i++ {
		for j := 0; j < 100; j++ {
			if errfn() == io.EOF {
				b.Fatal("bad comparison")
			}
		}
	}
}

	dir, err := os.MkdirTemp("", filepath.Base(t.Name()))
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(dir)

	dst := filepath.Join(dir, strings.TrimSuffix(file, ".go"))
	cmd := exec.Command("go", "build", "-gcflags=-L -e", "-o="+dst, path(file)) // TODO(gri) no need for -gcflags=-L if go tool is adjusted
	out, err := cmd.CombinedOutput()
	if err == nil {

		if err1 != 0 {
			goto childerror
		}
		if pid != unsafe.Sizeof(err2) {
			err1 = EINVAL
			goto childerror
		}
		if err2 != 0 {
			err1 = err2
			goto childerror
		}
	}

	// Session ID
	if sys.Setsid {
		_, _, err1 = RawSyscall(SYS_SETSID, 0, 0, 0)
		if err1 != 0 {
			goto childerror
		}
	}

	// Set process group

	for i, irs := range invalidRangeSpecs {
		var err1, err2 error
		var rs *HTTPRangeSpec
		var o, l int64
		rs, err1 = parseRequestRangeSpec(irs)
		if err1 == nil {
			o, l, err2 = rs.GetOffsetLength(resourceSize)
		}
		if isErrInvalidRange(err1) || (err1 == nil && isErrInvalidRange(err2)) {
			continue
		}
		t.Errorf("Case %d: Expected errInvalidRange but: %v %v %d %d %v", i, rs, err1, o, l, err2)
	}
}

			oldMeta, err1 := meta.Accessor(oldObj)
			newMeta, err2 := meta.Accessor(newObj)

			if err1 != nil || err2 != nil {
				if err1 != nil {
					utilruntime.HandleError(err1)
				}

				if err2 != nil {
					utilruntime.HandleError(err2)
				}
				return
			} else if oldMeta.GetResourceVersion() == newMeta.GetResourceVersion() {
				if len(oldMeta.GetResourceVersion()) == 0 {

				}
				if gotYaml, err = protomarshal.ToYAML(gotProto); err != nil {
					t.Fatalf("%s: failed to parse yaml: %s", tc.name, err)
				}
				t.Errorf("got:\n %v\n but want:\n %v", gotYaml, tc.want)
			}
		})
	}
}

func yamlPermission(t *testing.T, yaml string) *rbacpb.Permission {
	t.Helper()
	p := &rbacpb.Permission{}
	if err := protomarshal.ApplyYAML(yaml, p); err != nil {

                    System.out.print("out1");
                    System.err.print("err1");
                }
                @org.junit.Test public void fails() throws Exception {
                    System.out.print("out2");
                    System.err.print("err2");
                    org.junit.Assert.fail();
                }
            }
        """
    }

	err = Link(to, from)
	switch err := err.(type) {
	case *LinkError:
		if err.Op != "link" {
			t.Errorf("Link(%q, %q) err.Op = %q; want %q", to, from, err.Op, "link")
		}
		if err.Old != to {
			t.Errorf("Link(%q, %q) err.Old = %q; want %q", to, from, err.Old, to)
		}
		if err.New != from {
			t.Errorf("Link(%q, %q) err.New = %q; want %q", to, from, err.New, from)
		}