go source for verification 2026-05-22

test/fixedbugs/issue18655.go

@@ -0,0 +1,22 @@
+// 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 p
+
+type T struct{}
+type A = T
+type B = T
+
+func (T) m() {}
+func (T) m() {} // ERROR "already declared|redefinition"
+func (A) m() {} // ERROR "already declared|redefinition"
+func (A) m() {} // ERROR "already declared|redefinition"
+func (B) m() {} // ERROR "already declared|redefinition"
+func (B) m() {} // ERROR "already declared|redefinition"
+
+func (*T) m() {} // ERROR "already declared|redefinition"
+func (*A) m() {} // ERROR "already declared|redefinition"
+func (*B) m() {} // ERROR "already declared|redefinition"