defer func() {
		text := "panic while printing panic value"
		switch r := recover().(type) {
		case nil:
			// nothing to do
		case string:
			throw(text + ": " + r)
		default:
			throw(text + ": type " + toRType(efaceOf(&r)._type).string())
		}
	}()
	for p != nil {
		switch v := p.arg.(type) {
		case error:
			p.arg = v.Error()
		case stringer:
			p.arg = v.String()
		}

const UserArenaChunkBytes = userArenaChunkBytes

type UserArena struct {
	arena *userArena
}

func NewUserArena() *UserArena {
	return &UserArena{newUserArena()}
}

func (a *UserArena) New(out *any) {
	i := efaceOf(out)
	typ := i._type
	if typ.Kind_&abi.KindMask != abi.Pointer {
		panic("new result of non-ptr type")
	}
	typ = (*ptrtype)(unsafe.Pointer(typ)).Elem

Go struct types are not supported; use a C struct type.
Go array types are not supported; use a C pointer.

Go functions that take arguments of type string may be called with the
C type _GoString_, described above. The _GoString_ type will be
automatically defined in the preamble. Note that there is no way for C
code to create a value of this type; this is only useful for passing
string values from Go to C and back to Go.

		} else {
			h = _INVALID_HANDLE_VALUE
			timeout = uintptr(us) / 1000 // ms units
		}
		stdcall2(_WaitForSingleObject, h, timeout)
	})
}

func ctrlHandler(_type uint32) uintptr {
	var s uint32

	switch _type {
	case _CTRL_C_EVENT, _CTRL_BREAK_EVENT:
		s = _SIGINT
	case _CTRL_CLOSE_EVENT, _CTRL_LOGOFF_EVENT, _CTRL_SHUTDOWN_EVENT:
		s = _SIGTERM
	default:
		return 0
	}

// a package against any previously loaded version of the package.
// This is done in plugin.lastmoduleinit.
type modulehash struct {
	modulename   string
	linktimehash string
	runtimehash  *string
}

// pinnedTypemaps are the map[typeOff]*_type from the moduledata objects.
//
// These typemap objects are allocated at run time on the heap, but the

		contentType Header
	}{
		{"text", "", Header{"Content-Type": {"text/plain"}}},
		// Empty content type is legal - may be treated as
		// application/octet-stream (RFC 7231, section 3.1.1.5)
		{"empty", "", Header{}},
		{"boundary", "mime: invalid media parameter", Header{"Content-Type": {"text/plain; boundary="}}},
		{"unknown", "", Header{"Content-Type": {"application/unknown"}}},
	} {
		t.Run(test.name,

// only in a very limited callee of reflectcall, the stackArgs are copied, and
// regArgs is only used in the reflectcall frame.
//
//go:noescape
func reflectcall(stackArgsType *_type, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs)

// procyield should be an internal detail,
// but widely used packages access it using linkname.

	return f
}

// A TypeInfo contains information for a symbol
// that contains a runtime._type.
type TypeInfo struct {
	Type interface{} // a *cmd/compile/internal/types.Type
}

func (s *LSym) NewTypeInfo() *TypeInfo {
	if s.Extra != nil {
		panic(fmt.Sprintf("invalid use of LSym - NewTypeInfo with Extra of type %T", *s.Extra))
	}
	t := new(TypeInfo)
	s.Extra = new(interface{})
	*s.Extra = t
	return t