From 9c67489ca8d50da846d0cbc96ff01cb86eb9ed42 Mon Sep 17 00:00:00 2001
From: Don Armstrong <don@donarmstrong.com>
Date: Tue, 10 Jan 2017 14:43:14 -0600
Subject: [PATCH] make sure stop has length too

---
 lib/Reference/Retrieve/PubMed.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Reference/Retrieve/PubMed.pm b/lib/Reference/Retrieve/PubMed.pm
index d1de4e9..9c47775 100644
--- a/lib/Reference/Retrieve/PubMed.pm
+++ b/lib/Reference/Retrieve/PubMed.pm
@@ -423,7 +423,7 @@ sub _fix_medline_pages($){
      if (not defined $start) {
          ($start) = $pagination =~ /(\d+)/
      }
-     if ($start > $stop and defined $stop) {
+     if ($start > $stop and defined $stop and length($stop)) {
          # this must be a reduced page listing; fix it up
          $stop+=$start - $start % 10 ** (int(log($stop)/log(10))+1);
      }
-- 
2.39.2