From 4bc434000c42a7191e705c8a38216ca6743ad9ff Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Thu, 17 Jan 2019 08:50:19 -0500
Subject: [PATCH] Copy subdictionaries when removing resources (fixes #276)

---
 libqpdf/QPDFPageObjectHelper.cc | 1 +
 1 file changed, 1 insertion(+), 0 deletions(-)

diff --git a/libqpdf/QPDFPageObjectHelper.cc b/libqpdf/QPDFPageObjectHelper.cc
index 611f33e..ba64737 100644
--- a/libqpdf/QPDFPageObjectHelper.cc
+++ b/libqpdf/QPDFPageObjectHelper.cc
@@ -156,6 +156,7 @@ QPDFPageObjectHelper::removeUnreferencedResources()
         {
             continue;
         }
+        dict = dict.shallowCopy();
         resources.replaceKey(*d_iter, dict);
         std::set<std::string> keys = dict.getKeys();
         for (std::set<std::string>::iterator k_iter = keys.begin();
--
libgit2 0.21.4