From cbb2614975baf4269ad0c7944520d2d96799a925 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Thu, 7 Sep 2017 16:49:11 -0400
Subject: Fix command-line parsing for --rotate

---
 qpdf/qpdf.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/qpdf/qpdf.cc b/qpdf/qpdf.cc
index 4a92a038..96de8a13 100644
--- a/qpdf/qpdf.cc
+++ b/qpdf/qpdf.cc
@@ -1337,6 +1337,11 @@ static void parse_options(int argc, char* argv[], Options& o)
             }
             else if (strcmp(arg, "rotate") == 0)
             {
+                if (parameter == 0)
+                {
+                    usage("--rotate must be given as"
+                          " --rotate=[+|-]angle:page-range");
+                }
                 parse_rotation_parameter(o, parameter);
             }
             else if (strcmp(arg, "stream-data") == 0)
-- 
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