From e86d1ff6d4e5b66a91b242966028a0022408e050 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20Elio=20Petten=C3=B2?= <flameeyes@flameeyes.com>
Date: Mon, 31 Aug 2020 11:46:37 +0100
Subject: [PATCH] Fix out-of-bound access on some PDFs.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace the non-emptiness check with a minimum length check — you can't get the second to last item in a list of less than two items.
---
 pdfminer/pdfdocument.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdfminer/pdfdocument.py b/pdfminer/pdfdocument.py
index 19187aee..108d3487 100644
--- a/pdfminer/pdfdocument.py
+++ b/pdfminer/pdfdocument.py
@@ -669,7 +669,7 @@ def _getobj_parse(self, pos, objid):
             while kwd is not self.KEYWORD_OBJ:
                 (_, kwd) = self._parser.nexttoken()
                 x.append(kwd)
-            if x:
+            if len(x) >= 2:
                 objid1 = x[-2]
         # #### end hack around malformed pdf files
         if objid1 != objid: