if n < 3 || comp[0][0:3] != "net" {
		return nil, syscall.EPLAN9
	}

	name := comp[2]
	switch file := comp[n-1]; file {
	case "ctl", "clone":
		fd, err := syscall.Dup(int(f.Fd()), -1)
		if err != nil {
			return nil, os.NewSyscallError("dup", err)
		}
		defer close(fd)

		dir := netdir + "/" + comp[n-2]
		ctl = os.NewFile(uintptr(fd), dir+"/"+file)
		ctl.Seek(0, io.SeekStart)
		var buf [16]byte

    visitMethodInsn(opcode, owner.value, name, desc, itf)
}


internal
fun MethodVisitor.BASTORE() {
    visitInsn(Opcodes.BASTORE)
}


internal
fun MethodVisitor.DUP() {
    visitInsn(Opcodes.DUP)
}


internal
fun MethodVisitor.ARETURN() {
    visitInsn(Opcodes.ARETURN)
}


fun MethodVisitor.RETURN() {
    visitInsn(Opcodes.RETURN)
}


internal

		t, ok := tbFromContext(state.Context())
		if !ok {
			return nil, errors.New("script Context unexpectedly missing testing.TB key")
		}
		_, dup := scriptGoInvoked.LoadOrStore(t, true)
		if !dup {
			t.Cleanup(func() { scriptGoInvoked.Delete(t) })
		}
		return cmd.Run(state, s...)
	})
}

// scriptStale checks that the named build targets are stale.

	if d.state != spongeAbsorbing {
		panic("sha3: Sum after Read")
	}

	// Make a copy of the original hash so that caller can keep writing
	// and summing.
	dup := d.clone()
	hash := make([]byte, dup.outputLen, 64) // explicit cap to allow stack allocation
	dup.Read(hash)
	return append(in, hash...)

import static org.objectweb.asm.Opcodes.ACC_SYNTHETIC;
import static org.objectweb.asm.Opcodes.ARETURN;
import static org.objectweb.asm.Opcodes.ATHROW;
import static org.objectweb.asm.Opcodes.DUP;
import static org.objectweb.asm.Opcodes.INVOKESPECIAL;
import static org.objectweb.asm.Opcodes.INVOKESTATIC;
import static org.objectweb.asm.Opcodes.NEW;

/**

stderr '^go: -mod may only be set to readonly or vendor when in workspace mode'
env GOWORK=off
go list -mod=mod all
env GOWORK=

# Test that duplicates in the use list return an error
cp go.work go.work.backup
cp go.work.dup go.work
! go run example.com/b
stderr 'go.work:6: path .* appears multiple times in workspace'
cp go.work.backup go.work

cp go.work.d go.work
go work use # update go version
go run example.com/d

	_P_PID = 0

	_PROC_PDEATHSIG_CTL = 11
)

// Implemented in runtime package.
func runtime_BeforeFork()
func runtime_AfterFork()
func runtime_AfterForkInChild()

// Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child.
// If a dup or exec fails, write the errno error to pipe.
// (Pipe is close-on-exec so if exec succeeds, it will be closed.)
// In the child, this function must not acquire any locks, because

func (fd *FD) RawWrite(f func(uintptr) bool) error {
	return errors.New("not implemented")
}

func DupCloseOnExec(fd int) (int, string, error) {
	nfd, err := syscall.Dup(int(fd), -1)
	if err != nil {
		return 0, "dup", err
	}
	// Plan9 has no syscall.CloseOnExec but
	// its forkAndExecInChild closes all fds
	// not related to the fork+exec.
	return nfd, "", nil

    visitMethodInsn(opcode, owner.value, name, desc, itf)
}


internal
fun MethodVisitor.BASTORE() {
    visitInsn(Opcodes.BASTORE)
}


internal
fun MethodVisitor.DUP() {
    visitInsn(Opcodes.DUP)
}


internal
fun MethodVisitor.POP() {
    visitInsn(Opcodes.POP)
}


internal
fun MethodVisitor.ARETURN() {
    visitInsn(Opcodes.ARETURN)
}

		ffd.incomingEmpty <- true
	case syscall.SOCK_DGRAM:
		ffd.queue = newPacketQueue(defaultBuffer)
	default:
		return wrapErr(syscall.EINVAL)
	}

	fd.fakeNetFD = ffd
	if _, dup := sockets.LoadOrStore(ffd.fakeAddr, fd); dup {
		fd.fakeNetFD = nil
		return wrapErr(syscall.EADDRINUSE)
	}

	return nil
}

func fakeConnect(ctx context.Context, fd *netFD, laddr, raddr sockaddr) error {