1 files changed, 18 insertions, 0 deletions
diff --git a/test/fixedbugs/issue22921.go b/test/fixedbugs/issue22921.go
new file mode 100644
index 0000000000..04f78b2c08
--- /dev/null
+++ b/test/fixedbugs/issue22921.go
@@ -0,0 +1,18 @@
+// errorcheck
+
+// Copyright 2020 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 "bytes"
+
+type _ struct{ bytes.nonexist } // ERROR "unexported"
+
+type _ interface{ bytes.nonexist } // ERROR "unexported"
+
+func main() {
+	var _ bytes.Buffer
+	var _ bytes.buffer // ERROR "unexported"
+}