Initial commit: Go 1.23 release state

test/fixedbugs/issue21273.go

@@ -0,0 +1,28 @@
+// errorcheck
+
+// Copyright 2017 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 main
+
+type T0 T0 // ERROR "invalid recursive type"
+type _ map[T0]int
+
+type T1 struct{ T1 } // ERROR "invalid recursive type"
+type _ map[T1]int
+
+func f() {
+	type T2 T2 // ERROR "invalid recursive type"
+	type _ map[T2]int
+}
+
+func g() {
+	type T3 struct{ T3 } // ERROR "invalid recursive type"
+	type _ map[T3]int
+}
+
+func h() {
+	type T4 struct{ m map[T4]int } // ERROR "invalid map key"
+	type _ map[T4]int              // GC_ERROR "invalid map key"
+}