From a9c53a32c06362b4cf8a8fc964884cd7258b52f0 Mon Sep 17 00:00:00 2001
From: Roland Lutz <rlutz@hedmen.org>
Date: Tue, 11 Jul 2017 17:32:14 +0200
Subject: icemulti: Check for negative alignment exponent

---
 icemulti/icemulti.cc | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'icemulti')

diff --git a/icemulti/icemulti.cc b/icemulti/icemulti.cc
index 60b6fea..da90da3 100644
--- a/icemulti/icemulti.cc
+++ b/icemulti/icemulti.cc
@@ -241,6 +241,8 @@ int main(int argc, char **argv)
                 align_bits = strtol(optarg, &endptr, 0);
                 if (*endptr != '\0')
                     error("`%s' is not a valid number\n", optarg);
+                if (align_bits < 0)
+                    error("argument to `-%c' must be non-negative\n", c);
                 break;
             case 'o':
                 outfile_name = optarg;
-- 
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