1 files changed, 15 insertions, 0 deletions
diff --git a/test/typeparam/issue47924.go b/test/typeparam/issue47924.go
new file mode 100644
index 0000000000..1d1bab3bf9
--- /dev/null
+++ b/test/typeparam/issue47924.go
@@ -0,0 +1,15 @@
+// compile -G=3
+
+// 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 p
+
+type Cache[K any] struct{}
+
+func (c Cache[K]) foo(x interface{}, f func(K) bool) {
+	f(x.(K))
+}
+
+var _ Cache[int]