From 58797681e6387b0bbbf62baeeae028188276afcc Mon Sep 17 00:00:00 2001
From: Jakub Kucharski <jakubkucharski97@gmail.com>
Date: Mon, 1 Aug 2016 01:10:18 +0200
Subject: [PATCH] XRef::createDocInfoIfNoneExists(): don't presume that DocInfo
 is a dictionary

In case a PDF document doesn't comply with the PDF reference and its DocInfo
object isn't a dictionary, remove it and create a dictionary in its place.
---
 poppler/XRef.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/poppler/XRef.cc b/poppler/XRef.cc
index f88c632..75fa52d 100644
--- a/poppler/XRef.cc
+++ b/poppler/XRef.cc
@@ -1295,8 +1295,12 @@ Object *XRef::getDocInfoNF(Object *obj) {
 Object *XRef::createDocInfoIfNoneExists(Object *obj) {
   getDocInfo(obj);
 
-  if (!obj->isNull()) {
+  if (obj->isDict()) {
     return obj;
+  } else if (!obj->isNull()) {
+    // DocInfo exists, but isn't a dictionary (doesn't comply with the PDF reference)
+    obj->free();
+    removeDocInfo();
   }
 
   obj->initDict(this);
-- 
2.9.2