From 3c82bb3a9c0f01cf7d890d487cdf71a0ccb57cc2 Mon Sep 17 00:00:00 2001
From: Mathew Sutcliffe <oktal3700@gmail.com>
Date: Tue, 9 Aug 2016 23:59:29 +0100
Subject: [PATCH] Data cache shall emit an error message if it fails to save
 the revision file.

---
 src/blackmisc/datacache.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/blackmisc/datacache.cpp b/src/blackmisc/datacache.cpp
index 69902a762..97982b261 100644
--- a/src/blackmisc/datacache.cpp
+++ b/src/blackmisc/datacache.cpp
@@ -441,6 +441,11 @@ namespace BlackMisc
         json.insert("pins", toJson(m_pinnedValues));
         json.insert("deferrals", toJson(m_deferredValues));
         revisionFile.write(QJsonDocument(json).toJson());
+
+        if (! revisionFile.checkedClose())
+        {
+            CLogMessage(this).error("Failed to write to %1: %2") << revisionFile.fileName() << revisionFile.errorString();
+        }
     }
 
     void CDataCacheRevision::finishUpdate(bool keepPromises)