Initial commit: Go 1.23 release state

test/fixedbugs/issue23664.go

@@ -0,0 +1,17 @@
+// errorcheck
+
+// Copyright 2018 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.
+
+// Verify error messages for incorrect if/switch headers.
+
+package p
+
+func f() {
+	if f() true { // ERROR "unexpected name true, expected {"
+	}
+
+	switch f() true { // ERROR "unexpected name true, expected {"
+	}
+}