go source for verification 2026-05-22

test/fixedbugs/issue77779.go

@@ -0,0 +1,45 @@
+// run
+
+// Copyright 2026 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
+
+import (
+	"reflect"
+)
+
+type Renderer interface {
+	Render() error
+}
+
+type ZeroSize struct{}
+
+func (ZeroSize) Render() error { return nil }
+
+type Data struct {
+	X, Y, Z int
+}
+
+// Container is pointer-sized (8 bytes): zero-size embed + one pointer field.
+// This triggers Go 1.26 interface inlining, which produces a nil data pointer
+// for the zero-size field when extracted via reflect.Value.Interface().
+type Container struct {
+	ZeroSize
+	Data *Data
+}
+
+func main() {
+	render(Container{})
+	render(&Container{})
+}
+
+func render(iface any) {
+	if reflect.ValueOf(iface).Kind() == reflect.Ptr {
+		_ = reflect.ValueOf(iface).Elem().Field(0).Interface().(Renderer).Render()
+		return
+	}
+
+	_ = reflect.ValueOf(iface).Field(0).Interface().(Renderer).Render()
+}