type Error interface {
	error

	// RuntimeError is a no-op function but
	// serves to distinguish types that are run time
	// errors from ordinary errors: a type is a
	// run time error if it has a RuntimeError method.
	RuntimeError()
}

// A TypeAssertionError explains a failed type assertion.
type TypeAssertionError struct {
	_interface    *_type
	concrete      *_type

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime

import "unsafe"

func checkptrAlignment(p unsafe.Pointer, elem *_type, n uintptr) {
	// nil pointer is always suitably aligned (#47430).
	if p == nil {
		return
	}

	// Check that (*[n]elem)(p) is appropriately aligned.

		return l
	}
	l.w.byte(debugLogPtr)
	if x == nil {
		l.w.uvarint(0)
	} else {
		v := efaceOf(&x)
		switch v._type.Kind_ & abi.KindMask {
		case abi.Chan, abi.Func, abi.Map, abi.Pointer, abi.UnsafePointer:
			l.w.uvarint(uint64(uintptr(v.data)))
		default:
			throw("not a pointer type")
		}
	}
	return l
}

//go:nosplit
func (l *dlogger) s(x string) *dlogger {
	if !dlogEnabled {
		return l

}

func reqSignatureV4Verify(r *http.Request, region string, stype serviceType) (s3Error APIErrorCode) {
	sha256sum := getContentSha256Cksum(r, stype)
	switch {
	case isRequestSignatureV4(r):
		return doesSignatureMatch(sha256sum, r, region, stype)
	case isRequestPresignedSignatureV4(r):
		return doesPresignedSignatureMatch(sha256sum, r, region, stype)
	default:
		return ErrAccessDenied
	}
}

var allfin *finblock // list of all blocks

// NOTE: Layout known to queuefinalizer.
type finalizer struct {
	fn   *funcval       // function to call (may be a heap pointer)
	arg  unsafe.Pointer // ptr to object (may be a heap pointer)
	nret uintptr        // bytes of return values from fn
	fint *_type         // type of first argument of fn
	ot   *ptrtype       // type of ptr to object (may be a heap pointer)
}

var finalizer1 = [...]byte{

// guessIsMetricsReq - returns true if incoming request looks
// like metrics request
func guessIsMetricsReq(req *http.Request) bool {
	if req == nil {
		return false
	}
	aType := getRequestAuthType(req)
	return (aType == authTypeAnonymous || aType == authTypeJWT) &&
		req.URL.Path == minioReservedBucketPath+prometheusMetricsPathLegacy ||
		req.URL.Path == minioReservedBucketPath+prometheusMetricsV2ClusterPath ||

type note struct {
	// Futex-based impl treats it as uint32 key,
	// while sema-based impl as M* waitm.
	// Used to be a union, but unions break precise GC.
	key uintptr
}

type funcval struct {
	fn uintptr
	// variable-size, fn-specific data here
}

type iface struct {
	tab  *itab
	data unsafe.Pointer
}

type eface struct {
	_type *_type

		aType := string(a.Type)
		if aType == "" {
			allErrs = append(allErrs, field.Required(fldPath.Child("type"), ""))
			continue
		}
		if !knownTypes.Has(aType) {
			allErrs = append(allErrs, field.NotSupported(fldPath.Child("type"), aType, knownTypes.List()))
			continue
		}
		if seenAuthorizerTypes.Has(aType) && !repeatableTypes.Has(aType) {

				t.Errorf("wrong names result: %v", names)
			}
			for i, err := range errs {
				expErr := tc.errs[i]
				if err.Type != expErr.etype {
					t.Errorf("unexpected error type:\n\twant: %q\n\t got: %q", expErr.etype, err.Type)
				}
				if !strings.HasSuffix(err.Field, "."+expErr.field) {
					t.Errorf("unexpected error field:\n\twant: %q\n\t got: %q", expErr.field, err.Field)
				}

}

func panicmakeslicecap() {
	panic(errorString("makeslice: cap out of range"))
}

// makeslicecopy allocates a slice of "tolen" elements of type "et",
// then copies "fromlen" elements of type "et" into that new allocation from "from".
func makeslicecopy(et *_type, tolen int, fromlen int, from unsafe.Pointer) unsafe.Pointer {
	var tomem, copymem uintptr
	if uintptr(tolen) > uintptr(fromlen) {
		var overflow bool