return
	}

	testenv.MustHaveExec(t)
	t.Parallel()

	exe, err := os.Executable()
	if err != nil {
		t.Fatal(err)
	}

	cmd := testenv.Command(t, exe, "-test.run=^TestTBHelper$")
	cmd = testenv.CleanCmdEnv(cmd)
	cmd.Env = append(cmd.Env, "GO_WANT_HELPER_PROCESS=1")
	out, _ := cmd.CombinedOutput()

	want := `--- FAIL: TestTBHelper \([^)]+\)
    helperfuncs_test.go:15: 0
    helperfuncs_test.go:47: 1

	}
}

// CleanCmdEnv will fill cmd.Env with the environment, excluding certain
// variables that could modify the behavior of the Go tools such as
// GODEBUG and GOTRACEBACK.
//
// If the caller wants to set cmd.Dir, set it before calling this function,
// so PWD will be set correctly in the environment.
func CleanCmdEnv(cmd *exec.Cmd) *exec.Cmd {
	if cmd.Env != nil {
		panic("environment already set")
	}

		out:                       out,
	}

	cmd := &cobra.Command{
		Use:   "upgrade",
		Short: "Upgrade your cluster smoothly to a newer version with this command",
		Run:   cmdutil.SubCmdRun(),
	}

	cmd.AddCommand(newCmdApply(flags))
	cmd.AddCommand(newCmdPlan(flags))
	cmd.AddCommand(newCmdDiff(out))
	cmd.AddCommand(newCmdNode(out))
	return cmd
}

		}
	}

	var cmds []*exec.Cmd
	defer func() {
		for _, cmd := range cmds {
			cmd.Process.Kill()
		}
	}()

	args := append(append([]string(nil), os.Args[1:]...), "-test.run=^Test18146$")
	for n := attempts; n > 0; n-- {
		cmd := exec.Command(os.Args[0], args...)
		cmd.Env = append(os.Environ(), "test18146=exec")
		buf := bytes.NewBuffer(nil)
		cmd.Stdout = buf
		cmd.Stderr = buf

// such as TinyGo. See also the "crypto/...:purego" test in cmd/dist, which
// ensures the packages build correctly.
func TestPureGoTag(t *testing.T) {
	cmd := exec.Command(testenv.GoToolPath(t), "list", "-e", "crypto/...", "math/big")
	cmd.Env = append(cmd.Env, "GOOS=linux")
	cmd.Stderr = os.Stderr
	out, err := cmd.Output()
	if err != nil {
		log.Fatalf("loading package list: %v\n%s", err, out)
	}

	}
	defer r.Close()

	// Start the test binary.
	cmd = testenv.Command(t, "./a.exe", "-pipe-fd=3")
	cmd.Dir = dir
	cmd.ExtraFiles = []*os.File{w}
	var output bytes.Buffer
	cmd.Stdout = &output // for test logging
	cmd.Stderr = &output

	if err := cmd.Start(); err != nil {
		t.Fatalf("error starting test binary: %v", err)
	}
	w.Close()

	pid := cmd.Process.Pid

	// Wait for child to be ready.

	if err != nil {
		t.Fatal(err)
	}

	var walk func(string, *base.Command)
	walk = func(name string, cmd *base.Command) {
		if len(cmd.Commands) > 0 {
			for _, sub := range cmd.Commands {
				walk(name+" "+sub.Name(), sub)
			}
			return
		}
		if !cmd.Runnable() {
			return
		}
		if cmd.CustomFlags {
			if !strings.Contains(string(script), "# "+name+"\n") {

	// build go dll
	cmd := testenv.Command(t, testenv.GoToolPath(t), "build", "-o", dllfile, "-buildmode", "c-shared", "testdata/testwintls/main.go")
	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
	if err != nil {
		t.Fatalf("failed to build go library: %s\n%s", err, out)
	}

	// build c program
	cmd = testenv.Command(t, cc, "-o", exefile, "testdata/testwintls/main.c")
	testenv.CleanCmdEnv(cmd)

}

func main() {
	gopath := changeVolume(os.Args[1], strings.ToLower)
	dir := changeVolume(os.Args[2], strings.ToUpper)
	cmd := exec.Command("go", "run", "hello.go")
	cmd.Dir = dir
	cmd.Env = append(os.Environ(), "GOPATH="+gopath)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}

-- vend/hello/hello.go --
package main

tests of cmd/go and its subpackages.

They are written in a dialect of the same script language as in
cmd/go/testdata/script, and the outputs are hosted by the server in
cmd/go/internal/vcweb.

To see the conditions and commands available for these scripts, run:

	go test cmd/go/internal/vcweb -v --run=TestHelp

To host these scripts in a standalone server, run: