1 files changed, 26 insertions, 0 deletions
diff --git a/src/go/internal/gccgoimporter/testdata/issue31540.go b/src/go/internal/gccgoimporter/testdata/issue31540.go
new file mode 100644
index 0000000..2c6799e
--- /dev/null
+++ b/src/go/internal/gccgoimporter/testdata/issue31540.go
@@ -0,0 +1,26 @@
+// Copyright 2019 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 issue31540
+
+type Y struct {
+	q int
+}
+
+type Z map[int]int
+
+type X = map[Y]Z
+
+type A1 = X
+
+type A2 = A1
+
+type S struct {
+	b int
+	A2
+}
+
+func Hallo() S {
+	return S{}
+}