fix

Author: Hang Lyu

src/decoder/lattice-faster-decoder-combine-bucketqueue.cc

@@ -51,6 +51,7 @@ void BucketQueue<Token>::Push(Token *tok) {
     } else {  // less than 0
       int32 increase_size = - static_cast<int32>(bucket_index) + margin;
       buckets_.resize(buckets_.size() + increase_size);
+      first_nonempty_bucket_ = &buckets_[first_nonempty_bucket_index_];
       // translation
       for (size_t i = buckets_.size() - 1; i >= increase_size; i--) {
         buckets_[i].swap(buckets_[i - increase_size]);

src/decoder/lattice-faster-decoder-combine.cc

@@ -51,6 +51,7 @@ void BucketQueue<Token>::Push(Token *tok) {
     } else {  // less than 0
       int32 increase_size = - static_cast<int32>(bucket_index) + margin;
       buckets_.resize(buckets_.size() + increase_size);
+      first_nonempty_bucket_ = &buckets_[first_nonempty_bucket_index_];
       // translation
       for (size_t i = buckets_.size() - 1; i >= increase_size; i--) {
         buckets_[i].swap(buckets_[i - increase_size]);