[gnome-builder] code: only update objects when context is accessible

[Christian Hergert <chergert src gnome org>]

commit 06068a50d2f731bb98af132d0e1afeb71d0295d6
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jan 27 12:01:51 2019 -0800

    code: only update objects when context is accessible
    
    Fixes #787

 src/libide/code/ide-buffer.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/src/libide/code/ide-buffer.c b/src/libide/code/ide-buffer.c
index 9ae289ecf..55838b431 100644
--- a/src/libide/code/ide-buffer.c
+++ b/src/libide/code/ide-buffer.c
@@ -2630,10 +2630,13 @@ ide_buffer_dup_content (IdeBuffer *self)
        */
       self->content = g_bytes_new_take (g_steal_pointer (&text), len);
 
-      file = ide_buffer_get_file (self);
-      context = ide_buffer_ref_context (IDE_BUFFER (self));
-      unsaved_files = ide_unsaved_files_from_context (context);
-      ide_unsaved_files_update (unsaved_files, file, self->content);
+      if (!ide_object_in_destruction (IDE_OBJECT (self)))
+        {
+          file = ide_buffer_get_file (self);
+          context = ide_buffer_ref_context (IDE_BUFFER (self));
+          unsaved_files = ide_unsaved_files_from_context (context);
+          ide_unsaved_files_update (unsaved_files, file, self->content);
+        }
     }
 
   return g_bytes_ref (self->content);