From: Jim Meyering <jim@meyering.net>
Date: Fri, 22 Jan 1993 19:41:33 +0000 (+0000)
Subject: IS* macros may not be given arguments with side effects.
X-Git-Tag: ISDIGIT-bug-fix^0
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2694667b8df009082bdf526f4c78e3572759e86c;p=thirdparty%2Fcoreutils.git

IS* macros may not be given arguments with side effects.
---

diff --git a/src/pr.c b/src/pr.c
index c49819d806..1abb686bbd 100644
--- a/src/pr.c
+++ b/src/pr.c
@@ -455,7 +455,8 @@ main (argc, argv)
 	  s = optarg;
 	  if (*s == '+')
 	    {
-	      if (!ISDIGIT (*++s))
+	      ++s;
+	      if (!ISDIGIT (*s))
 		usage ("`+' requires a numeric argument");
 	      first_page_number = atoi (s);
 	    }