}
	defer os.RemoveAll(tmpDir)

	const sep = string(os.PathSeparator)
	tests := []struct {
		pattern string
		wantErr bool
	}{
		{"ioutil*test", false},
		{"ioutil_test*foo", false},
		{"ioutil_test" + sep + "foo", true},
		{"ioutil_test*" + sep + "foo", true},
		{"ioutil_test" + sep + "*foo", true},
		{sep + "ioutil_test" + sep + "*foo", true},
		{"ioutil_test*foo" + sep, true},
	}
	for _, tt := range tests {

// sep: string to search for
// R1=&s[0], R2=len(s)
// R3=&sep[0], R4=len(sep)
// R5=&ret (int)
// Caller must confirm availability of vx facility before calling.
TEXT indexbody<>(SB),NOSPLIT|NOFRAME,$0
	CMPBGT	R4, R2, notfound
	ADD	R1, R2
	SUB	R4, R2 // R2=&s[len(s)-len(sep)] (last valid index)
	CMPBEQ	R4, $0, notfound
	SUB	$1, R4 // R4=len(sep)-1 for use as VLL index
	VLL	R4, (R3), V0 // contains first 16 bytes of sep
	MOVD	R1, R7
index2plus:

	type args struct {
		n   string
		sep string
	}
	tests := []struct {
		name string
		args args
		want string
	}{
		{
			name: "foo_bar",
			args: args{
				n:   "foo_bar",
				sep: "_",
			},
			want: "FooBar",
		},
		{
			name: "foo-bar",
			args: args{
				n:   "foo-bar",
				sep: "-",
			},
			want: "FooBar",
		},
		{
			name: "foo9bar",

	op = strings.Replace(op, "_dot_", ".", -1)
	op = strings.ToLower(op)
	buf.WriteString(op)
	sep := " "
	for i, arg := range inst.Args {
		if arg == nil {
			break
		}
		text := gnuArg(&inst, i, arg)
		if text == "" {
			continue
		}
		buf.WriteString(sep)
		sep = ", "
		buf.WriteString(text)
	}
	return buf.String()
}

func gnuArg(inst *Inst, argIndex int, arg Arg) string {

	"os/exec"
	"strings"
)

func main() {
	// test(" ") // old deprecated & removed syntax
	test("=") // new syntax
}

func test(sep string) {
	// Successful run
	cmd := exec.Command("go", "run", "-ldflags=-X main.tbd"+sep+"hello -X main.overwrite"+sep+"trumped -X main.nosuchsymbol"+sep+"neverseen", "linkx.go")
	var out, errbuf bytes.Buffer
	cmd.Stdout = &out
	cmd.Stderr = &errbuf
	err := cmd.Run()
	if err != nil {

			}
			fmt.Printf("%s# %s\n%s", sep, m.Path, why)
			sep = "\n"
		}
	} else {
		// Resolve to packages.
		matches, _ := modload.LoadPackages(ctx, loadOpts, args...)

		modload.LoadPackages(ctx, loadOpts, "all") // rebuild graph, from main module (not from named packages)

		sep := ""
		for _, m := range matches {
			for _, path := range m.Pkgs {

				begin := rand.Intn(len(s) + 1)
				end := begin + rand.Intn(len(s)+1-begin)
				sep := s[begin:end]
				if i%4 == 0 {
					pos := rand.Intn(len(sep) + 1)
					sep = sep[:pos] + "A" + sep[pos:]
				}
				want := simpleIndex(s, sep)
				res := Index(s, sep)
				if res != want {
					t.Errorf("Index(%s,%s) = %d; want %d", s, sep, res, want)
				}
			}
		}
	}
}

func TestIndexRune(t *testing.T) {

	name = graph.ShortenFunctionName(name)
	seps := sepRE.FindAllStringIndex(name, -1)
	result := make([]string, 0, len(seps)+1)
	result = append(result, name)
	for _, sep := range seps {
		// Suffix starting just after sep
		if sep[1] < len(name) {
			result = append(result, name[sep[1]:])
		}
	}
	return result

func PkgLinksym(prefix, name string, abi obj.ABI) *obj.LSym {
	if name == "_" {
		// TODO(mdempsky): Cleanup callers and Fatalf instead.
		return linksym(prefix, "_", abi)
	}
	sep := "."
	if ReservedImports[prefix] {
		sep = ":"
	}
	return linksym(prefix, prefix+sep+name, abi)
}

// Linkname returns the linker symbol for the given name as it might
// appear within a //go:linkname directive.

func ExampleCutPrefix() {
	show := func(s, sep string) {
		after, found := strings.CutPrefix(s, sep)
		fmt.Printf("CutPrefix(%q, %q) = %q, %v\n", s, sep, after, found)
	}
	show("Gopher", "Go")
	show("Gopher", "ph")
	// Output:
	// CutPrefix("Gopher", "Go") = "pher", true
	// CutPrefix("Gopher", "ph") = "Gopher", false
}

func ExampleCutSuffix() {
	show := func(s, sep string) {