From 7849c8724a1ee2580da7a8d0e1c1661bc13e1f41 Mon Sep 17 00:00:00 2001
From: Yusuke Shinyama <yusuke@shinyama.jp>
Date: Fri, 28 Mar 2014 17:29:26 +0900
Subject: [PATCH] Fixed: PDFXRefStream.get_objids returns invalid objids.

---
 pdfminer/pdfdocument.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pdfminer/pdfdocument.py b/pdfminer/pdfdocument.py
index b97538b..58b2e9c 100644
--- a/pdfminer/pdfdocument.py
+++ b/pdfminer/pdfdocument.py
@@ -238,7 +238,11 @@ class PDFXRefStream(PDFBaseXRef):
     def get_objids(self):
         for (start, nobjs) in self.ranges:
             for i in xrange(nobjs):
-                yield start+i
+                offset = self.entlen * i
+                ent = self.data[offset:offset+self.entlen]
+                f1 = nunpack(ent[:self.fl1], 1)
+                if f1 == 1 or f1 == 2:
+                    yield start+i
         return
 
     def get_pos(self, objid):