From 14b5bf13863918f558bc07a9d9e8c7c729a76ee7 Mon Sep 17 00:00:00 2001
From: Morgan Hardwood <entertheyoni@gmail.com>
Date: Sat, 6 Aug 2016 21:24:36 +0200
Subject: [PATCH] Prevents thumbnail race condition, from Floessie in #3304 and
 fixes #3384

---
 rtgui/thumbnail.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rtgui/thumbnail.cc b/rtgui/thumbnail.cc
index 5e2c7f28f..b9d23e46d 100644
--- a/rtgui/thumbnail.cc
+++ b/rtgui/thumbnail.cc
@@ -499,6 +499,8 @@ void Thumbnail::decreaseRef ()
 
 void Thumbnail::getThumbnailSize (int &w, int &h, const rtengine::procparams::ProcParams *pparams)
 {
+    MyMutex::MyLock lock(mutex);
+
     int tw_ = tw;
     int th_ = th;
     float imgRatio_ = imgRatio;