small fix

2 files changed, 4 insertions, 1 deletions

diff --git a/training/dtrain/dtrain_net_interface.cc b/training/dtrain/dtrain_net_interface.cc
index e21920d0..6d24bb7b 100644
--- a/training/dtrain/dtrain_net_interface.cc
+++ b/training/dtrain/dtrain_net_interface.cc
@@ -127,7 +127,7 @@ main(int argc, char** argv)
           ostringstream os;
           cerr << "[dtrain] 1best features " << (*samples)[0].f << endl;
           if (output_derivation) {
-            os << observer->GetViterbiTreeString() << endl;
+            os << observer->GetViterbiTreeStr() << endl;
           } else {
             PrintWordIDVec((*samples)[0].w, os);
           }
diff --git a/training/dtrain/sample_net_interface.h b/training/dtrain/sample_net_interface.h
index affcd0d6..a2b5f87d 100644
--- a/training/dtrain/sample_net_interface.h
+++ b/training/dtrain/sample_net_interface.h
@@ -17,6 +17,7 @@ struct ScoredKbest : public DecoderObserver
   vector<Ngrams>* ref_ngs_;
   vector<size_t>* ref_ls_;
   bool dont_score;
+  string viterbiTreeStr_;
 
   ScoredKbest(const size_t k, PerSentenceBleuScorer* scorer) :
     k_(k), scorer_(scorer), dont_score(false) {}
@@ -42,6 +43,7 @@ struct ScoredKbest : public DecoderObserver
       samples_.push_back(h);
       effective_sz_++;
       feature_count_ += h.f.size();
+      viterbiTreeStr_ = hg->show_viterbi_tree(false);
     }
   }
 
@@ -53,6 +55,7 @@ struct ScoredKbest : public DecoderObserver
   }
   inline size_t GetFeatureCount() { return feature_count_; }
   inline size_t GetSize() { return effective_sz_; }
+  inline string GetViterbiTreeStr() { return viterbiTreeStr_; }
 };
 
 } // namespace