func (c *desCipher) Encrypt(dst, src []byte) {
	if len(src) < BlockSize {
		panic("crypto/des: input not full block")
	}
	if len(dst) < BlockSize {
		panic("crypto/des: output not full block")
	}
	if alias.InexactOverlap(dst[:BlockSize], src[:BlockSize]) {
		panic("crypto/des: invalid buffer overlap")
	}
	cryptBlock(c.subkeys[:], dst, src, false)
}

	panic("implement me")
}

func (f fakeInstance) Clusters() cluster.Clusters {
	panic("implement me")
}

func (f fakeInstance) Call(echo.CallOptions) (echo.CallResult, error) {
	panic("implement me")
}

func (f fakeInstance) CallOrFail(test.Failer, echo.CallOptions) echo.CallResult {
	panic("implement me")
}

func (f fakeInstance) UpdateWorkloadLabel(add map[string]string, remove []string) error {

		didPanic := false
		defer func() {
			// Only report that the test is complete if it doesn't panic,
			// as otherwise the test binary can exit before the panic is
			// reported to the user. See issue 41479.
			if didPanic {
				return
			}
			if err != nil {
				panic(err)
			}
			running.Delete(t.name)
			t.signal <- signal
		}()

		doPanic := func(err any) {

cp go.mod.21 go.mod
! go run .
stderr 'panic: panic called with nil argument'

! go run rsc.io/panicnil
stderr 'panic: panic called with nil argument'

# Programs in Go 1.20 work module use old panic nil behavior.
cp go.mod.20 go.mod
! go run .
stderr 'panic: nil'

! go run rsc.io/panicnil
stderr 'panic: nil'

# Programs in no module at all should use their go.mod file.
rm go.mod

			t.Fatal("failed to propagate panic on stop")
		}
		// Make sure we don't panic again if we try to call next or stop.
		if _, ok := next(); ok {
			t.Fatal("next returned true after iterator panicked")
		}
		// Calling stop again should be a no-op.
		stop()
	})
}

func panicSeq() Seq[int] {
	return func(yield func(int) bool) {
		panic("boom")
	}
}

func (u *unwinder) finishInternal() {
	u.frame.pc = 0

	// Note that panic != nil is okay here: there can be leftover panics,
	// because the defers on the panic stack do not nest in frame order as
	// they do on the defer stack. If you have:
	//
	//	frame 1 defers d1
	//	frame 2 defers d2
	//	frame 3 defers d3
	//	frame 4 panics
	//	frame 4's panic starts running defers
	//	frame 5, running d3, defers d4
	//	frame 5 panics

// pool is not available (for instance in a container which does not have a root
// certificate bundle). SetFallbackRoots will panic if roots is nil.
//
// SetFallbackRoots may only be called once, if called multiple times it will
// panic.
//
// The fallback behavior can be forced on all platforms, even when there is a
// system certificate pool, by setting GODEBUG=x509usefallbackroots=1 (note that

// manipulation of memory may cause faults at non-nil addresses in less
// dramatic situations; SetPanicOnFault allows such programs to request
// that the runtime trigger only a panic, not a crash.
// The runtime.Error that the runtime panics with may have an additional method:
//
//	Addr() uintptr
//
// If that method exists, it returns the memory address which triggered the fault.

		panic("bootstrap type wrong id: " + got.name() + " " + got.string() + " not " + want.string())
	}
}

// used for building the basic types; called only from init().  the incoming
// interface always refers to a pointer.
func bootstrapType(name string, e any) typeId {
	rt := reflect.TypeOf(e).Elem()
	_, present := types[rt]
	if present {

// and panic indicators, and the runtime, which turns them into more meaningful strings
// For best code generation, RF_DONE and RF_READY should be 0 and 1.
const (
	RF_DONE          = RF_State(iota) // body of loop has exited in a non-panic way
	RF_READY                          // body of loop has not exited yet, is not running  -- this is not a panic index