if cls := runtime.GCTestPointerClass(unsafe.Pointer(new)); cls != "stack" {
			t.Fatalf("test bug: new (%#x) should be a stack pointer, not %s", new2, cls)
		}
		// This was a real failure.
		return false
	}
	return true
}

func TestGCTestMoveStackRepeatedly(t *testing.T) {
	// Move the stack repeatedly to make sure we're not doubling
	// it each time.
	for i := 0; i < 100; i++ {

	lineNum  int // current line number.
	env      []string
}

// run runs the generators in the current file.
func (g *Generator) run() (ok bool) {
	// Processing below here calls g.errorf on failure, which does panic(stop).
	// If we encounter an error, we abort the package.
	defer func() {
		e := recover()
		if e != nil {
			ok = false
			if e != stop {
				panic(e)
			}
			base.SetExitStatus(1)

			}
		} else if err := syscall.SetNonblock(fd, true); err == nil {
			f.nonblock = true
			clearNonBlock = true
		} else {
			pollable = false
		}
	}

	// An error here indicates a failure to register
	// with the netpoll system. That can happen for
	// a file descriptor that is not supported by
	// epoll/kqueue; for example, disk files on
	// Linux systems. We assume that any real error

	{26, "SIGVTALRM", "virtual timer expired"},
	{27, "SIGPROF", "profiling timer expired"},
	{28, "SIGWINCH", "window changed"},
	{29, "SIGIO", "I/O possible"},
	{30, "SIGPWR", "power failure"},
	{31, "SIGSYS", "bad system call"},

	// RoundTrip should not attempt to interpret the response. In
	// particular, RoundTrip must return err == nil if it obtained
	// a response, regardless of the response's HTTP status code.
	// A non-nil err should be reserved for failure to obtain a
	// response. Similarly, RoundTrip should not attempt to
	// handle higher-level protocol details such as redirects,
	// authentication, or cookies.
	//
	// RoundTrip should not modify the request, except for

	}
}

// assignableTo reports whether x is assignable to a variable of type T. If the
// result is false and a non-nil cause is provided, it may be set to a more
// detailed explanation of the failure (result != ""). The returned error code
// is only valid if the (first) result is false. The check parameter may be nil
// if assignableTo is invoked through an exported API call, i.e., when all
// methods have been type-checked.

		}
	}
}

func TestErrorContextWithTreeCopy(t *testing.T) {
	tree, err := New("root").Parse("{{if true}}{{end}}", "", "", make(map[string]*Tree), nil)
	if err != nil {
		t.Fatalf("unexpected tree parse failure: %v", err)
	}
	treeCopy := tree.Copy()
	wantLocation, wantContext := tree.ErrorContext(tree.Root.Nodes[0])
	gotLocation, gotContext := treeCopy.ErrorContext(treeCopy.Root.Nodes[0])
	if wantLocation != gotLocation {

		argv = append(argv, "-ldflags", "-extldflags=-Wl,--export-all-symbols")
	}
	argv = append(argv, "-o", objfile, srcfile)
	out, err := exec.Command("go", argv...).CombinedOutput()
	if err != nil {
		t.Fatalf("build failure: %s\n%s\n", err, string(out))
	}

	f, err := pe.Open(objfile)
	if err != nil {
		t.Fatalf("pe.Open failed: %v", err)
	}
	defer f.Close()
	section := f.Section(".edata")
	if section == nil {

				if testenv.SyscallIsNotSupported(err) {
					// May be inside a container that disallows CLONE_NEWUSER.
					t.Skipf("skipping: CLONE_NEWUSER appears to be unsupported")
				}
				t.Fatalf("unexpected command failure; output:\n%s", out)
			}

			sout := strings.TrimSpace(string(out))
			want := "root"
			if sout != want {
				t.Fatalf("whoami = %q; want %q", out, want)
			}
		})
	}
}

var cgoTypeSigRe = lazyregexp.New(`\b_C2?(type|func|var|macro)_\B`)

// run runs the command given by cmdline in the directory dir.
// If the command fails, run prints information about the failure
// and returns a non-nil error.
func (sh *Shell) run(dir string, desc string, env []string, cmdargs ...any) error {
	out, err := sh.runOut(dir, env, cmdargs...)
	if desc == "" {