1 files changed, 31 insertions, 0 deletions
diff --git a/test/typeparam/append.go b/test/typeparam/append.go
new file mode 100644
index 0000000..6168262
--- /dev/null
+++ b/test/typeparam/append.go
@@ -0,0 +1,31 @@
+// run
+
+// Copyright 2021 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
+
+type Recv <-chan int
+
+type sliceOf[E any] interface {
+	~[]E
+}
+
+func _Append[S sliceOf[T], T any](s S, t ...T) S {
+	return append(s, t...)
+}
+
+func main() {
+	recv := make(Recv)
+	a := _Append([]Recv{recv}, recv)
+	if len(a) != 2 || a[0] != recv || a[1] != recv {
+		panic(a)
+	}
+
+	recv2 := make(chan<- int)
+	a2 := _Append([]chan<- int{recv2}, recv2)
+	if len(a2) != 2 || a2[0] != recv2 || a2[1] != recv2 {
+		panic(a)
+	}
+}