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-rw-r--r--decoder/ff_wordalign.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/decoder/ff_wordalign.cc b/decoder/ff_wordalign.cc
index f8b8060c..f2f07033 100644
--- a/decoder/ff_wordalign.cc
+++ b/decoder/ff_wordalign.cc
@@ -454,6 +454,7 @@ void LexicalTranslationTrigger::TraversalFeaturesImpl(const SentenceMetadata& sm
assert(edge.rule_->FWords() == 1);
WordID trg = edge.rule_->e()[0];
WordID src = edge.rule_->f()[0];
+ assert(triggers_.size() > smeta.GetSentenceID());
const vector<WordID>& triggers = triggers_[smeta.GetSentenceID()];
for (int i = 0; i < triggers.size(); ++i) {
FireFeature(triggers[i], src, trg, features);