go source for verification 2026-05-22

test/fixedbugs/issue6402.go

@@ -0,0 +1,13 @@
+// errorcheck
+
+// Copyright 2014 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 6402: spurious 'use of untyped nil' error
+
+package p
+
+func f() uintptr {
+	return nil // ERROR "cannot use nil as type uintptr in return argument|incompatible type|cannot use nil"
+}