Initial commit: Go 1.23 release state

test/fixedbugs/issue48301.go

@@ -0,0 +1,13 @@
+// errorcheck
+
+// 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.
+
+// Don't crash while reporting the error.
+
+package p
+
+func _() {
+	type T = T // ERROR "invalid recursive type: T refers to itself"
+}