diff -Nru confuse-2.6.orig/src/lexer.l confuse-2.6/src/lexer.l
--- confuse-2.6.orig/src/lexer.l	2007-10-13 17:12:20.000000000 +0200
+++ confuse-2.6/src/lexer.l	2009-07-06 12:51:31.531656794 +0200
@@ -63,6 +63,7 @@
 %}
 
 %option noyywrap
+%option noinput
 
  /* start conditions
   */