--- texinfo-6.3-orig/info/nodes.c	2016-09-07 02:43:16.000000000 +0200
+++ texinfo-6.3/info/nodes.c	2016-10-02 16:11:10.568140803 +0200
@@ -1102,7 +1102,7 @@
         return NULL;
 
       for (i = 0; (tag = file_buffer->tags[i]); i++)
-        if (strcmp (nodename, tag->nodename) == 0)
+        if ((tag->nodename != NULL) && (strcmp (nodename, tag->nodename) == 0))
           {
             node = info_node_of_tag (file_buffer, &file_buffer->tags[i]);
             break;