From 6bdd2aab447e2c8258a8b05dee6430e01aacbb6b Mon Sep 17 00:00:00 2001
From: zonble <zonble@gmail.com>
Date: Mon, 10 Jan 2022 01:02:04 +0800
Subject: [PATCH] Fixes a bug on building the unigrams.

---
 Source/Engine/Gramambular/BlockReadingBuilder.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Source/Engine/Gramambular/BlockReadingBuilder.h b/Source/Engine/Gramambular/BlockReadingBuilder.h
index 52cd2a86..08508b55 100644
--- a/Source/Engine/Gramambular/BlockReadingBuilder.h
+++ b/Source/Engine/Gramambular/BlockReadingBuilder.h
@@ -236,8 +236,10 @@ namespace Formosa {
                             unigrams.insert(unigrams.end(), globalUnigrams.begin(), globalUnigrams.end());
                         }
 
-                        Node n(combinedReading, unigrams, vector<Bigram>());
-                        m_grid.insertNode(n, p, q);
+                        if (unigrams.size() > 0) {
+                            Node n(combinedReading, unigrams, vector<Bigram>());
+                            m_grid.insertNode(n, p, q);
+                        }
                     }
                 }
             }