From a01359189b32c60c2d55b039f7aefd6c3ce0ebde Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Fri, 4 Jan 2019 10:17:33 -0500
Subject: Fix dangling references (fixes #240)

On certain operations, such as iterating through all objects and
adding new indirect objects, walk through the entire object structure
and explicitly resolve any indirect references to non-existent
objects. That prevents new objects from springing into existence and
causing the previously dangling references to point to them.
---
 libqpdf/QPDFWriter.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'libqpdf/QPDFWriter.cc')

diff --git a/libqpdf/QPDFWriter.cc b/libqpdf/QPDFWriter.cc
index 71c48333..22b990ff 100644
--- a/libqpdf/QPDFWriter.cc
+++ b/libqpdf/QPDFWriter.cc
@@ -2244,6 +2244,7 @@ QPDFWriter::prepareFileForWrite()
     // includes stream lengths, stream filtering parameters, and
     // document extension level information.
 
+    this->m->pdf.fixDanglingReferences(true);
     std::list<QPDFObjectHandle> queue;
     queue.push_back(getTrimmedTrailer());
     std::set<int> visited;
-- 
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