From 5641832e54e347c2c33e9304d96cca450eb305ed Mon Sep 17 00:00:00 2001
From: m-holger <m-holger@kubitscheck.org>
Date: Mon, 8 Jan 2024 11:43:57 +0000
Subject: Tweak QPDF::read_xref

---
 libqpdf/QPDF.cc | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index a089a6c2..5d09f900 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -708,16 +708,11 @@ QPDF::read_xref(qpdf_offset_t xref_offset)
     m->deleted_objects.clear();
 
     // Make sure we keep only the highest generation for any object.
-    QPDFObjGen::set to_delete;
-    QPDFObjGen last_og;
-    for (auto const& og: m->xref_table) {
-        if (og.first.getObj() == last_og.getObj()) {
-            to_delete.emplace(last_og);
-        }
-        last_og = og.first;
-    }
-    for (auto const& og: to_delete) {
-        removeObject(og);
+    QPDFObjGen last_og{-1, 0};
+    for (auto const& [og, _xref]: m->xref_table) {
+        if (og.getObj() == last_og.getObj())
+            removeObject(last_og);
+        last_og = og;
     }
 }
 
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