Initial commit: Go 1.23 release state

test/typeparam/issue49246.dir/a.go

@@ -0,0 +1,20 @@
+// Copyright 2021 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 a
+
+type R[T any] struct{ v T }
+
+func (r R[T]) Self() R[T] { return R[T]{} }
+
+type Fn[T any] func() R[T]
+
+func X() (r R[int]) { return r.Self() }
+
+func Y[T any](a Fn[T]) Fn[int] {
+	return func() (r R[int]) {
+		// No crash: return R[int]{}
+		return r.Self()
+	}
+}

test/typeparam/issue49246.dir/b.go

@@ -0,0 +1,9 @@
+// Copyright 2021 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 b
+
+import "./a"
+
+func Crash() { a.Y(a.X)() }