From 1f66d914e435e733a7741e6b98abf92594122c01 Mon Sep 17 00:00:00 2001
From: Fabian Kosmale <fabian.kosmale@qt.io>
Date: Sat, 17 Oct 2020 21:09:24 +0200
Subject: QMutableEventPoint::detach: deref old private

After detaching, the current QMutableEventPoint obviously doesn't
reference old QMutableEventPointPrivate anymore. Deref it, so that we
do not leak memory.

Change-Id: I3b59667603d41f452eead9a2db13e1d005f622ec
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
---
 src/gui/kernel/qevent.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/gui')

diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp
index d34b74d9d0..5a539ccaf6 100644
--- a/src/gui/kernel/qevent.cpp
+++ b/src/gui/kernel/qevent.cpp
@@ -479,8 +479,10 @@ void QMutableEventPoint::detach()
     if (d->refCount == 1)
         return; // no need: there is only one QEventPoint using it
     qCDebug(lcEPDetach) << "detaching: refCount" << d->refCount << this;
+    auto old = d;
     d = new QEventPointPrivate(*d);
     d->refCount = 1;
+    --old->refCount;
 }
 
 /*! \internal
-- 
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