Initial commit: Go 1.23 release state

test/interface/fail.go

@@ -0,0 +1,39 @@
+// run
+
+// 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.
+
+// Test that interface conversion fails when method is missing.
+
+package main
+
+type I interface {
+	Foo()
+}
+
+func main() {
+	shouldPanic(p1)
+}
+
+func p1() {
+	var s *S
+	var i I
+	var e interface{}
+	e = s
+	i = e.(I)
+	_ = i
+}
+
+type S struct{}
+
+func (s *S) _() {}
+
+func shouldPanic(f func()) {
+	defer func() {
+		if recover() == nil {
+			panic("function should panic")
+		}
+	}()
+	f()
+}