1 files changed, 23 insertions, 0 deletions
diff --git a/test/typeparam/issue47676.go b/test/typeparam/issue47676.go
new file mode 100644
index 0000000..8569378
--- /dev/null
+++ b/test/typeparam/issue47676.go
@@ -0,0 +1,23 @@
+// 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
+
+func main() {
+	d := diff([]int{}, func(int) string {
+		return "foo"
+	})
+	d()
+}
+
+func diff[T any](previous []T, uniqueKey func(T) string) func() {
+	return func() {
+		newJSON := map[string]T{}
+		for _, prev := range previous {
+			delete(newJSON, uniqueKey(prev))
+		}
+	}
+}