---
 libgetopt++/include/getopt++/DefaultFormatter.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libgetopt++/include/getopt++/DefaultFormatter.h b/libgetopt++/include/getopt++/DefaultFormatter.h
index ee2397f5..43c253a5 100644
--- a/libgetopt++/include/getopt++/DefaultFormatter.h
+++ b/libgetopt++/include/getopt++/DefaultFormatter.h
@@ -64,6 +64,7 @@ class DefaultFormatter {
        {
          // TODO: consider using a line breaking strategy here.
          int pos = helpmsg.substr(0,h_len).find_last_of(" ");
+         if(!pos)break; /*In Chinese Helpmsg,may has no space,so pos ==0,and code will fall in dead loop here*/
          theStream << helpmsg.substr(0,pos)
                    << std::endl << std::string (o_len, ' ');
          helpmsg.erase (0,pos+1);
--
2.43.0