From 021c229331444aae507186c7b4a54bb1692b5846 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Fri, 25 Aug 2017 22:26:53 -0400
Subject: [PATCH] Fix Pl_Flate memory leak on error (fixes #148)

---
 libqpdf/Pl_Flate.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/libqpdf/Pl_Flate.cc b/libqpdf/Pl_Flate.cc
index ce4c9ed1..212f7e1d 100644
--- a/libqpdf/Pl_Flate.cc
+++ b/libqpdf/Pl_Flate.cc
@@ -35,6 +35,20 @@ Pl_Flate::~Pl_Flate()
 	delete [] this->outbuf;
 	this->outbuf = 0;
     }
+
+    if (this->initialized)
+    {
+        z_stream& zstream = *(static_cast<z_stream*>(this->zdata));
+        if (action == a_deflate)
+        {
+            deflateEnd(&zstream);
+        }
+        else
+        {
+            inflateEnd(&zstream);
+        }
+    }
+
     delete static_cast<z_stream*>(this->zdata);
     this->zdata = 0;
 }
@@ -174,6 +188,7 @@ Pl_Flate::finish()
                 {
                     err = inflateEnd(&zstream);
                 }
+                this->initialized = false;
                 checkError("End", err);
             }