go source for verification 2026-05-22

test/fixedbugs/bug231.go

@@ -0,0 +1,24 @@
+// errorcheck
+
+// Copyright 2009 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 I interface{ m() }
+type T struct{ m func() }
+type M struct{}
+
+func (M) m() {}
+
+func main() {
+	var t T
+	var m M
+	var i I
+
+	i = m
+	// types2 does not give extra error "T.m is a field, not a method"
+	i = t // ERROR "not a method|has no methods|does not implement I"
+	_ = i
+}