1 files changed, 43 insertions, 0 deletions
diff --git a/test/typeparam/issue50437.dir/a.go b/test/typeparam/issue50437.dir/a.go
new file mode 100644
index 0000000..4a136b5
--- /dev/null
+++ b/test/typeparam/issue50437.dir/a.go
@@ -0,0 +1,43 @@
+// Copyright 2022 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 a
+
+type MarshalOptions struct {
+	*typedArshalers[MarshalOptions]
+}
+
+func Marshal(in interface{}) (out []byte, err error) {
+	return MarshalOptions{}.Marshal(in)
+}
+
+func (mo MarshalOptions) Marshal(in interface{}) (out []byte, err error) {
+	err = mo.MarshalNext(in)
+	return nil, err
+}
+
+func (mo MarshalOptions) MarshalNext(in interface{}) error {
+	a := new(arshaler)
+	a.marshal = func(MarshalOptions) error { return nil }
+	return a.marshal(mo)
+}
+
+type arshaler struct {
+	marshal func(MarshalOptions) error
+}
+
+type typedArshalers[Options any] struct {
+	m M
+}
+
+func (a *typedArshalers[Options]) lookup(fnc func(Options) error) (func(Options) error, bool) {
+	a.m.Load(nil)
+	return fnc, false
+}
+
+type M struct {}
+
+func (m *M) Load(key any) (value any, ok bool) {
+	return
+}