===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/eqn.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -c -r1.18 -r1.19
*** src/usr.bin/mandoc/eqn.c	2014/10/25 14:32:07	1.18
--- src/usr.bin/mandoc/eqn.c	2014/10/25 15:05:21	1.19
***************
*** 1,4 ****
! /*	$OpenBSD: eqn.c,v 1.18 2014/10/25 14:32:07 schwarze Exp $ */
  /*
   * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
--- 1,4 ----
! /*	$OpenBSD: eqn.c,v 1.19 2014/10/25 15:05:21 schwarze Exp $ */
  /*
   * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
***************
*** 682,688 ****
  	char		 sym[64];
  	const char	*start;
  
! 	assert(NULL != parent);
  
  next_tok:
  	tok = eqn_tok_parse(ep, &p);
--- 682,690 ----
  	char		 sym[64];
  	const char	*start;
  
! 	assert(parent != NULL);
! 	if (ep->data == NULL)
! 		return(-1);
  
  next_tok:
  	tok = eqn_tok_parse(ep, &p);