1 files changed, 15 insertions, 1 deletions
diff --git a/src/google/protobuf/map_unittest.proto b/src/google/protobuf/map_unittest.proto
index b6a988b3..cbf747d9 100644
--- a/src/google/protobuf/map_unittest.proto
+++ b/src/google/protobuf/map_unittest.proto
@@ -62,7 +62,7 @@ message TestMap {
 }
 
 message TestMapSubmessage {
-  optional TestMap test_map = 1;
+  TestMap test_map = 1;
 }
 
 message TestMessageMap {
@@ -104,3 +104,17 @@ message TestArenaMap {
   map<int32   , MapEnum > map_int32_enum        = 14;
   map<int32   , ForeignMessage> map_int32_foreign_message = 15;
 }
+
+// Previously, message containing enum called Type cannot be used as value of
+// map field.
+message MessageContainingEnumCalledType {
+  enum Type {
+    TYPE_FOO = 0;
+  }
+  map<int32, MessageContainingEnumCalledType> type = 1;
+}
+
+// Previously, message cannot contain map field called "entry".
+message MessageContainingMapCalledEntry {
+  map<int32, int32> entry = 1;
+}