1 files changed, 46 insertions, 0 deletions
diff --git a/test/fixedbugs/issue18640.go b/test/fixedbugs/issue18640.go
new file mode 100644
index 0000000..091bbe5
--- /dev/null
+++ b/test/fixedbugs/issue18640.go
@@ -0,0 +1,46 @@
+// compile
+
+// 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.
+
+package p
+
+type (
+	a = b
+	b struct {
+		*a
+	}
+)
+
+type (
+	c struct {
+		*d
+	}
+	d = c
+)
+
+// The compiler cannot handle these cases. Disabled for now.
+// See issue #25838.
+/*
+type (
+	e = f
+	f = g
+	g = []h
+	h i
+	i = j
+	j = e
+)
+
+type (
+	a1 struct{ *b1 }
+	b1 = c1
+	c1 struct{ *b1 }
+)
+
+type (
+	a2 struct{ b2 }
+	b2 = c2
+	c2 struct{ *b2 }
+)
+*/