1 files changed, 20 insertions, 0 deletions
diff --git a/test/fixedbugs/issue48357.go b/test/fixedbugs/issue48357.go
new file mode 100644
index 0000000000..5b39fc43d4
--- /dev/null
+++ b/test/fixedbugs/issue48357.go
@@ -0,0 +1,20 @@
+// 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
+
+import "reflect"
+
+type T [129]byte
+
+func main() {
+	m := map[string]T{}
+	v := reflect.ValueOf(m)
+	v.SetMapIndex(reflect.ValueOf("a"), reflect.ValueOf(T{}))
+	g = m["a"]
+}
+
+var g T