2 files changed, 99 insertions, 0 deletions
diff --git a/test/interface/embed3.dir/embed0.go b/test/interface/embed3.dir/embed0.go
new file mode 100644
index 0000000..614609e
--- /dev/null
+++ b/test/interface/embed3.dir/embed0.go
@@ -0,0 +1,21 @@
+// 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 p
+
+type I1 interface {
+	Foo(int)
+}
+
+type I2 interface {
+	foo(int)
+}
+
+type M1 int
+
+func (M1) foo() {}
+
+type M2 int
+
+func (M2) foo(int) {}
diff --git a/test/interface/embed3.dir/embed1.go b/test/interface/embed3.dir/embed1.go
new file mode 100644
index 0000000..d042482
--- /dev/null
+++ b/test/interface/embed3.dir/embed1.go
@@ -0,0 +1,78 @@
+// 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 main
+
+import "./embed0"
+
+type X1 struct{}
+
+func (X1) Foo() {}
+
+type X2 struct{}
+
+func (X2) foo() {}
+
+type X3 struct{}
+
+func (X3) foo(int) {}
+
+type X4 struct{ p.M1 }
+
+type X5 struct{ p.M1 }
+
+func (X5) foo(int) {}
+
+type X6 struct{ p.M2 }
+
+type X7 struct{ p.M2 }
+
+func (X7) foo() {}
+
+type X8 struct{ p.M2 }
+
+func (X8) foo(int) {}
+
+func main() {
+	var i1 interface{} = X1{}
+	check(func() { _ = i1.(p.I1) }, "interface conversion: main.X1 is not p.I1: missing method Foo")
+
+	var i2 interface{} = X2{}
+	check(func() { _ = i2.(p.I2) }, "interface conversion: main.X2 is not p.I2: missing method foo")
+
+	var i3 interface{} = X3{}
+	check(func() { _ = i3.(p.I2) }, "interface conversion: main.X3 is not p.I2: missing method foo")
+
+	var i4 interface{} = X4{}
+	check(func() { _ = i4.(p.I2) }, "interface conversion: main.X4 is not p.I2: missing method foo")
+
+	var i5 interface{} = X5{}
+	check(func() { _ = i5.(p.I2) }, "interface conversion: main.X5 is not p.I2: missing method foo")
+
+	var i6 interface{} = X6{}
+	check(func() { _ = i6.(p.I2) }, "")
+
+	var i7 interface{} = X7{}
+	check(func() { _ = i7.(p.I2) }, "")
+
+	var i8 interface{} = X8{}
+	check(func() { _ = i8.(p.I2) }, "")
+}
+
+func check(f func(), msg string) {
+	defer func() {
+		v := recover()
+		if v == nil {
+			if msg == "" {
+				return
+			}
+			panic("did not panic")
+		}
+		got := v.(error).Error()
+		if msg != got {
+			panic("want '" + msg + "', got '" + got + "'")
+		}
+	}()
+	f()
+}