make Bitmap constructor explicit in case we accidently create a copy during cube pruning algorithm

2 files changed, 2 insertions, 2 deletions

diff --git a/moses/FF/BleuScoreFeature.cpp b/moses/FF/BleuScoreFeature.cpp
index eaecd59af..f02230455 100644
--- a/moses/FF/BleuScoreFeature.cpp
+++ b/moses/FF/BleuScoreFeature.cpp
@@ -538,7 +538,7 @@ FFState* BleuScoreFeature::EvaluateWhenApplied(const Hypothesis& cur_hypo,
     ctx_start_idx = 0;
   }
 
-  Bitmap coverageVector = cur_hypo.GetWordsBitmap();
+  const Bitmap &coverageVector = cur_hypo.GetWordsBitmap();
   new_state->m_source_length = coverageVector.GetNumWordsCovered();
 
   new_state->m_words = new_words.GetSubString(Range(ctx_start_idx,
diff --git a/moses/FF/OSM-Feature/OpSequenceModel.cpp b/moses/FF/OSM-Feature/OpSequenceModel.cpp
index db62c45bf..8153debbd 100644
--- a/moses/FF/OSM-Feature/OpSequenceModel.cpp
+++ b/moses/FF/OSM-Feature/OpSequenceModel.cpp
@@ -94,7 +94,7 @@ FFState* OpSequenceModel::EvaluateWhenApplied(
 {
   const TargetPhrase &target = cur_hypo.GetCurrTargetPhrase();
   const Bitmap &bitmap = cur_hypo.GetWordsBitmap();
-  Bitmap myBitmap = bitmap;
+  Bitmap myBitmap(bitmap);
   const Manager &manager = cur_hypo.GetManager();
   const InputType &source = manager.GetSource();
   // const Sentence &sourceSentence = static_cast<const Sentence&>(source);