From a43453d9a2b12943cb4528a4249fce407a3318f4 Mon Sep 17 00:00:00 2001
From: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Date: Fri, 14 Mar 2025 10:20:39 +0100
Subject: [PATCH] QTimeLine: do not restart() an invalid QElapsedTimer

It's UB (as per docs). Creating a QTimeLine and calling
setCurrentTime() will end up calling restart() without having called
start() first. Moreover, the return value of restart() isn't used,
so that's useless work.

Pick-to: 6.9 6.8 6.5
Change-Id: I53c80838f60fae406a44ffe2cf578c6c79cc9df4
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
---
 src/corelib/tools/qtimeline.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/corelib/tools/qtimeline.cpp b/src/corelib/tools/qtimeline.cpp
index fd3c7e48fed..5c759efd7e8 100644
--- a/src/corelib/tools/qtimeline.cpp
+++ b/src/corelib/tools/qtimeline.cpp
@@ -538,7 +538,7 @@ void QTimeLine::setCurrentTime(int msec)
     Q_D(QTimeLine);
     d->startTime = 0;
     d->currentLoopCount = 0;
-    d->timer.restart();
+    d->timer.start();
     d->setCurrentTime(msec);
 }