[glib] gfile: don't report completion twice on g_file_load_contents error

[Cosimo Cecchi <cosimoc src gnome org>]

commit e908b50371a5052d7a9690b3409ae028d46540b4
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sun Jan 20 14:00:50 2013 -0500

    gfile: don't report completion twice on g_file_load_contents error
    
    When an error occurs while reading the file input stream in
    g_file_load_contents (e.g. because the operation was cancelled), the
    code is correctly calling g_task_return_error(), but in the callback
    from the close operation, g_task_return_boolean() will be called again.
    
    Code that cleans up its state in the async callback will then be called
    twice, leading to invalid memory access.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692202

 gio/gfile.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/gio/gfile.c b/gio/gfile.c
index 3a0e947..e2f0d43 100644
--- a/gio/gfile.c
+++ b/gio/gfile.c
@@ -6514,11 +6514,12 @@ load_contents_read_callback (GObject      *obj,
 
   if (read_size < 0)
     {
-      /* EOF, close the file */
       g_task_return_error (data->task, error);
-      g_input_stream_close_async (stream, 0,
-                                  g_task_get_cancellable (data->task),
-                                  load_contents_close_callback, data);
+      g_object_unref (data->task);
+
+      /* Close the file ignoring any error */
+      g_input_stream_close_async (stream, 0, NULL, NULL, NULL);
+      g_object_unref (stream);
     }
   else if (read_size == 0)
     {