1 files changed, 28 insertions, 0 deletions
diff --git a/test/typeparam/issue48598.go b/test/typeparam/issue48598.go
new file mode 100644
index 0000000..945b332
--- /dev/null
+++ b/test/typeparam/issue48598.go
@@ -0,0 +1,28 @@
+// 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 Iterator[T any] interface {
+	Iterate()
+}
+
+type IteratorFunc[T any] func(fn func(T) bool)
+
+func (f IteratorFunc[T]) Iterate() {
+}
+
+func FromIterator[T any](it Iterator[T]) {
+	it.Iterate()
+}
+
+func Foo[T, R any]() {
+	FromIterator[R](IteratorFunc[R](nil))
+}
+
+func main() {
+	Foo[int, int]()
+}