From 344f64eab7a5606d345b2277cd51fd8fa1099ad2 Mon Sep 17 00:00:00 2001
From: Pandagrapher <pierre.cab@gmail.com>
Date: Thu, 3 Nov 2022 12:43:06 +0100
Subject: [PATCH] Fixes issue loading image cache data

With some versions of Glib/Glibmm library on MacOS, Glib::KeyFile "load_from_file" function does not raise a Glib::Error but another exception. This causes cached data not saved on disk (and thumbnails not displayed in explorer). Adds robustness testing if file is present first before calling the function
---
 rtgui/cacheimagedata.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/rtgui/cacheimagedata.cc b/rtgui/cacheimagedata.cc
index d44ca28ec..8e20df2e3 100644
--- a/rtgui/cacheimagedata.cc
+++ b/rtgui/cacheimagedata.cc
@@ -20,6 +20,7 @@
 #include <vector>
 #include <glib/gstdio.h>
 #include <glibmm/keyfile.h>
+#include <glibmm/fileutils.h>
 #include "version.h"
 #include <locale.h>
 
@@ -250,7 +251,9 @@ int CacheImageData::save (const Glib::ustring& fname)
     Glib::KeyFile keyFile;
 
     try {
-        keyFile.load_from_file (fname);
+        if (Glib::file_test(fname, Glib::FILE_TEST_EXISTS)) {
+            keyFile.load_from_file (fname);
+        }
     } catch (Glib::Error&) {}
 
     keyFile.set_string  ("General", "MD5", md5);