@@ -199,7 +199,7 @@ func (locker *Locker) Unlock(ctx context.Context, opts ...UnlockOption) error {
 	}
 
 	err := locker.assertLockHeld(ctx)
-	if errors.As(err, &lockNotHeldError{}) {
+	if _, ok := errors.AsType[lockNotHeldError](err); ok {
 		return fmt.Errorf("unlock called when lock is not held: %w", err)
 	}
 	if err != nil {
Original file line number	Diff line number	Diff line change
`@@ -199,7 +199,7 @@ func (locker *Locker) Unlock(ctx context.Context, opts ...UnlockOption) error {`
`199`	`199`	`}`
`200`	`200`
`201`	`201`	`err := locker.assertLockHeld(ctx)`
`202`		`- if errors.As(err, &lockNotHeldError{}) {`
	`202`	`+ if _, ok := errors.AsType[lockNotHeldError](err); ok {`
`203`	`203`	`return fmt.Errorf("unlock called when lock is not held: %w", err)`
`204`	`204`	`}`
`205`	`205`	`if err != nil {`