From d8fa7f3e9b8127911996c36f477bcae3831f7708 Mon Sep 17 00:00:00 2001
From: graehl <graehl@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Tue, 31 Aug 2010 01:56:56 +0000
Subject: l2r bugfixes

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@635 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 decoder/viterbi.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'decoder/viterbi.h')

diff --git a/decoder/viterbi.h b/decoder/viterbi.h
index e78cd157..ac0b9a11 100644
--- a/decoder/viterbi.h
+++ b/decoder/viterbi.h
@@ -55,6 +55,8 @@ typename WeightFunction::Weight Viterbi(const Hypergraph& hg,
       antsb[k] = &vit_result[edgeb.tail_nodes_[k]];
     traverse(edgeb, antsb, cur_node_best_result);
   }
+  if (vit_result.empty())
+    return WeightType(0);
   std::swap(*result, vit_result.back());
   return vit_weight.back();
 }
-- 
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