go source for verification 2026-05-22

test/fixedbugs/issue13266.go

@@ -0,0 +1,10 @@
+// errorcheck
+
+// Copyright 2015 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.
+
+// Offending character % must not be interpreted as
+// start of format verb when emitting error message.
+
+package% // ERROR "unexpected %|package name must be an identifier|after package clause|expected declaration"