Initial commit: Go 1.23 release state

test/fixedbugs/issue66663.go

@@ -0,0 +1,34 @@
+// compile
+
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type Iterator[A any] func() (bool, A)
+
+type Range[A any] interface {
+	Blocks() Iterator[Block[A]]
+}
+
+type Block[A any] interface {
+	Range[A]
+}
+
+type rangeImpl[A any] struct{}
+
+func (r *rangeImpl[A]) Blocks() Iterator[Block[A]] {
+	return func() (bool, Block[A]) {
+		var a Block[A]
+		return false, a
+	}
+}
+
+func NewRange[A any]() Range[A] {
+	return &rangeImpl[A]{}
+}
+
+type AddrImpl struct{}
+
+var _ = NewRange[AddrImpl]()