diff --git a/test/interface10.go b/test/interface10.go
new file mode 100644
index 00000000000..6afd42a2f48
--- /dev/null
+++ b/test/interface10.go
@@ -0,0 +1,78 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 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
+
+const Value = 1e12
+
+type Inter interface { M() int64 }
+
+type T int64
+func (t T) M() int64 { return t }
+var t = T(Value)
+var pt = &t
+var ti Inter = t
+var pti = &ti
+
+type S struct { Inter }
+var s = S{ ti }
+var ps = &s
+
+type SP struct { *Inter }
+var sp = SP{ &ti }
+var psp = &sp
+
+var i Inter
+var pi = &i
+
+var ok = true
+
+func check(v int64, s string) {
+	if v != Value {
+		println(s, v);
+		ok = false;
+	}
+}
+
+func main() {
+	check(t.M(), "t.M");
+	check(pt.M(), "pt.M");
+	check(ti.M(), "ti.M");
+	check(pti.M(), "pti.M");
+	check(s.M(), "s.M");
+	check(ps.M(), "ps.M");
+	check(sp.M(), "sp.M");
+	check(psp.M(), "psp.M");
+
+	i = t;
+	check(i.M(), "i.M - i = t");
+	check(pi.M(), "pi.M - i = t");
+
+	i = pt;
+	check(i.M(), "i.M - i = pt");
+	check(pi.M(), "pi.M - i = pt");
+
+	i = s;
+	check(i.M(), "i.M - i = s");
+	check(pi.M(), "pi.M - i = s");
+
+	i = ps;
+	check(i.M(), "i.M - i = ps");
+	check(pi.M(), "pi.M - i = ps");
+
+	i = sp;
+	check(i.M(), "i.M - i = sp");
+	check(pi.M(), "pi.M - i = sp");
+
+	i = psp;
+	check(i.M(), "i.M - i = psp");
+	check(pi.M(), "pi.M - i = psp");
+
+	if !ok {
+		println("BUG: interface10");
+		sys.Exit(1)
+	}
+}