From 9d272713fbc0be1176940c0b48bc02399df50fb6 Mon Sep 17 00:00:00 2001
From: Ivailo Monev <xakepa10@laimg.moc>
Date: Wed, 1 Jan 2020 17:39:59 +0000
Subject: [PATCH] do not delete shared null QMap data

Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
---
 src/core/tools/qmap.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/tools/qmap.cpp b/src/core/tools/qmap.cpp
index d0c04c503..bf1ebf725 100644
--- a/src/core/tools/qmap.cpp
+++ b/src/core/tools/qmap.cpp
@@ -73,7 +73,8 @@ void QMapData::continueFreeData(int offset)
         cur = cur->forward[0];
         ::free(reinterpret_cast<char *>(prev) - offset);
     }
-    delete this;
+    if (this != &shared_null)
+        delete this;
 }
 
 /*!