1 files changed, 3 insertions, 0 deletions
diff --git a/src/google/protobuf/util/message_differencer.cc b/src/google/protobuf/util/message_differencer.cc
index 03a334b6..328b40d8 100644
--- a/src/google/protobuf/util/message_differencer.cc
+++ b/src/google/protobuf/util/message_differencer.cc
@@ -626,6 +626,7 @@ bool MessageDifferencer::CompareWithFieldsInternal(
       }
 
       if (reporter_ != NULL) {
+        assert(field1 != NULL);
         int count = field1->is_repeated() ?
             reflection1->FieldSize(message1, field1) : 1;
 
@@ -706,6 +707,7 @@ bool MessageDifferencer::CompareWithFieldsInternal(
     }
 
     bool fieldDifferent = false;
+    assert(field1 != NULL);
     if (field1->is_repeated()) {
       fieldDifferent = !CompareRepeatedField(message1, message2, field1,
                                              parent_fields);
@@ -875,6 +877,7 @@ bool MessageDifferencer::CompareRepeatedField(
 
   for (int i = 0; i < count1; ++i) {
     if (match_list1[i] != -1) continue;
+    assert(reporter_ != NULL);
     specific_field.index = i;
     parent_fields->push_back(specific_field);
     reporter_->ReportDeleted(message1, message2, *parent_fields);