From 236994673157c0e6146a1aecabd2a0baee63d93d Mon Sep 17 00:00:00 2001
From: Ko van der Sloot <K.vanderSloot@let.ru.nl>
Date: Wed, 13 Nov 2019 15:43:36 +0100
Subject: [PATCH] don't crash on 'empty' documents. should fix
 https://github.com/LanguageMachines/foliautils/issues/37

---
 src/FoLiA-2text.cxx | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/FoLiA-2text.cxx b/src/FoLiA-2text.cxx
index 3c269ab..844cb76 100644
--- a/src/FoLiA-2text.cxx
+++ b/src/FoLiA-2text.cxx
@@ -166,9 +166,18 @@ int main( int argc, char *argv[] ){
       }
     }
     else {
-      ofstream os( outname );
-      UnicodeString us = d->text( class_name,retaintok);
-      os << us << endl;
+      UnicodeString us;
+      try {
+	UnicodeString us = d->text( class_name, retaintok);
+      }
+      catch( ... ){
+	cout << "document '" << docName << "' contains no text in class="
+	     << class_name << endl;
+      }
+      if ( !us.isEmpty() ){
+	ofstream os( outname );
+	os << us << endl;
+      }
 #pragma omp critical
       {
 	cout << "Processed :" << docName << " into " << outname