types/dynamicpb: fix message Zero return type to read-only

Changes the message Zero return type to be read-only by omitting internal known map. Change-Id: I1c1191a125df74251be3d8bb70f4b06c1ff57070 Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/223857 Reviewed-by: Joe Tsai <[email protected]>
protocolbuffers · Mar 20, 2020 · 9d39786 · 9d39786
1 parent 2ce1ca9
commit 9d39786
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/types/dynamicpb/dynamic.go b/types/dynamicpb/dynamic.go
@@ -323,7 +323,7 @@ func NewMessageType(desc pref.MessageDescriptor) pref.MessageType {
 }
 
 func (mt messageType) New() pref.Message                  { return NewMessage(mt.desc) }
-func (mt messageType) Zero() pref.Message                 { return NewMessage(mt.desc) }
+func (mt messageType) Zero() pref.Message                 { return &Message{typ: messageType{mt.desc}} }
 func (mt messageType) Descriptor() pref.MessageDescriptor { return mt.desc }
 
 type emptyList struct {