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Date: Mon, 15 Dec 2014 18:43:26 -0500 (EST)
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From: schwarze@mdocml.bsd.lv
To: source@mdocml.bsd.lv
Subject: mdocml: Empty conditions count as false.
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Log Message:
-----------
Empty conditions count as false.
When negated, they still count as false.
Found when investigating crashes jsg@ found with afl.
Not completely fixing the crashes yet.

Modified Files:
--------------
    mdocml:
        roff.c

Revision Data
-------------
Index: roff.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/roff.c,v
retrieving revision 1.239
retrieving revision 1.240
diff -Lroff.c -Lroff.c -u -p -r1.239 -r1.240
--- roff.c
+++ roff.c
@@ -1258,6 +1258,8 @@ roff_evalcond(struct roff *r, int ln, co
 		wanttrue = 1;
 
 	switch (v[*pos]) {
+	case '\0':
+		return(0);
 	case 'n':
 		/* FALLTHROUGH */
 	case 'o':
--
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