From b2a6ca64e0d13c4b123c9e94383dec7f452a90f8 Mon Sep 17 00:00:00 2001
From: marsqing <q_gu@ctrip.com>
Date: Thu, 31 Aug 2017 15:29:28 +0800
Subject: [PATCH] skip unknown nested key

---
 .../fasterxml/jackson/dataformat/protobuf/ProtobufParser.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java b/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
index a6a680b07..6e34e154c 100644
--- a/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
+++ b/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
@@ -736,6 +736,10 @@ private JsonToken _handleNestedKey(int tag) throws IOException
         if ((_currentField == null) || (f = _currentField.nextOrThisIf(id)) == null) {
             f = _currentMessage.field(id);
         }
+        // Note: may be null; if so, value needs to be skipped
+        if (f == null) {
+            return _skipUnknownField(id, wireType);
+        }
         _parsingContext.setCurrentName(f.name);
         if (!f.isValidFor(wireType)) {
             _reportIncompatibleType(f, wireType);