From 621ccc5e4e1f5e51f2e145dd9f7e65f4a043ff77 Mon Sep 17 00:00:00 2001
From: Tommaso Cucinotta <tommaso@lyx.org>
Date: Sun, 2 Apr 2017 14:55:33 +0200
Subject: [PATCH] Restrict file cache expiry time to positive values.

---
 src/frontends/qt4/GuiPrefs.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/frontends/qt4/GuiPrefs.cpp b/src/frontends/qt4/GuiPrefs.cpp
index 1d8bb201ff..69877e38da 100644
--- a/src/frontends/qt4/GuiPrefs.cpp
+++ b/src/frontends/qt4/GuiPrefs.cpp
@@ -72,6 +72,7 @@
 #include <iomanip>
 #include <sstream>
 #include <algorithm>
+#include <math.h>
 
 using namespace Ui;
 
@@ -1683,7 +1684,7 @@ PrefConverters::PrefConverters(GuiPreferences * form)
 
 	converterED->setValidator(new NoNewLineValidator(converterED));
 	converterFlagED->setValidator(new NoNewLineValidator(converterFlagED));
-	maxAgeLE->setValidator(new QDoubleValidator(maxAgeLE));
+	maxAgeLE->setValidator(new QDoubleValidator(0, HUGE_VAL, 6, maxAgeLE));
 	//converterDefGB->setFocusProxy(convertersLW);
 }
 
-- 
2.39.2