From 0dc0fbf78dabd596fd71e9dba838884f129fe514 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Fri, 10 Jul 2009 18:12:09 -0700
Subject: [PATCH] Add check for prec > unit in `timescale directive.

---
 lexor.lex | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lexor.lex b/lexor.lex
index 954a2ab61..c3937fc64 100644
--- a/lexor.lex
+++ b/lexor.lex
@@ -1205,6 +1205,13 @@ static void process_timescale(const char*txt)
 	    return;
       }
 
+	/* The time unit must be greater than or equal to the precision. */
+      if (unit < prec) {
+	    VLerror(yylloc, "error: `timescale unit must not be less than "
+	                    "the precision.");
+	    return;
+      }
+
       pform_set_timescale(unit, prec, yylloc.text, yylloc.first_line);
 }