quick fix for out-of-bound alignment points

1 files changed, 6 insertions, 0 deletions

diff --git a/moses/TranslationModel/CompactPT/PhraseDecoder.cpp b/moses/TranslationModel/CompactPT/PhraseDecoder.cpp
index ec3efdbb4..3cf2f010e 100644
--- a/moses/TranslationModel/CompactPT/PhraseDecoder.cpp
+++ b/moses/TranslationModel/CompactPT/PhraseDecoder.cpp
@@ -414,6 +414,12 @@ TargetPhraseVectorPtr PhraseDecoder::DecodeCollection(
 
     if(state == Add) {
       if(m_phraseDictionary.m_useAlignmentInfo) {
+        size_t sourceSize = sourcePhrase.GetSize();
+        size_t targetSize = targetPhrase->GetSize();
+        for(std::set<AlignPointSizeT>::iterator it = alignment.begin(); it != alignment.end(); it++) {
+          if(it->first >= sourceSize || it->second >= targetSize)
+            return TargetPhraseVectorPtr();
+        }
         targetPhrase->SetAlignTerm(alignment);
       }