go source for verification 2026-05-22

test/fixedbugs/issue68526.dir/a/a.go

@@ -0,0 +1,14 @@
+// Copyright 2024 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 a
+
+type A[T any] = struct{ F T }
+
+type B = struct{ F int }
+
+func F() B {
+	type a[T any] = struct{ F T }
+	return a[int]{}
+}

test/fixedbugs/issue68526.dir/main.go

@@ -0,0 +1,43 @@
+// Copyright 2024 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 (
+	"fmt"
+
+	"issue68526.dir/a"
+)
+
+func main() {
+	unexported()
+	exported()
+}
+
+func unexported() {
+	var want struct{ F int }
+
+	if any(want) != any(a.B{}) || any(want) != any(a.F()) {
+		panic("zero value of alias and concrete type not identical")
+	}
+}
+
+func exported() {
+	var (
+		astr a.A[string]
+		aint a.A[int]
+	)
+
+	if any(astr) != any(struct{ F string }{}) || any(aint) != any(struct{ F int }{}) {
+		panic("zero value of alias and concrete type not identical")
+	}
+
+	if any(astr) == any(aint) {
+		panic("zero value of struct{ F string } and struct{ F int } are not distinct")
+	}
+
+	if got := fmt.Sprintf("%T", astr); got != "struct { F string }" {
+		panic(got)
+	}
+}