Initial commit: Go 1.23 release state

test/fixedbugs/issue63489a.go

@@ -0,0 +1,20 @@
+// errorcheck -lang=go1.22
+
+// Copyright 2023 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.
+
+// This file has been changed from its original version as
+// //go:build file versions below 1.21 set the language version to 1.21.
+// The original tested a -lang version of 1.21 with a file version of
+// go1.4 while this new version tests a -lang version of go1.22
+// with a file version of go1.21.
+
+//go:build go1.21
+
+package p
+
+func f() {
+	for _ = range 10 { // ERROR "file declares //go:build go1.21"
+	}
+}