go source for verification 2026-05-22

test/fixedbugs/issue21770.go

@@ -0,0 +1,20 @@
+// 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.
+
+// Issue 21770: gccgo incorrectly accepts "p.f = 0" where p is **struct
+
+package p
+
+type PP **struct{ f int }
+
+func f() {
+	// anonymous type
+	var p **struct{ f int }
+	p.f = 0 // ERROR "field"
+	// named type
+	var p2 PP
+	p2.f = 0 // ERROR "field"
+}