[gnome-builder] code-indexer: add file tracing

[Christian Hergert <chergert src gnome org>]

commit eb7da6a7f5febc2fa422d9a6be083081418d9c9d
Author: Christian Hergert <chergert redhat com>
Date:   Tue Aug 7 14:40:58 2018 -0700

    code-indexer: add file tracing
    
    In case we're a development build, we might want to simplify who is causing
    a leak of the file here.

 src/libide/symbols/ide-code-indexer.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/libide/symbols/ide-code-indexer.c b/src/libide/symbols/ide-code-indexer.c
index 3f3002721..1995dbae1 100644
--- a/src/libide/symbols/ide-code-indexer.c
+++ b/src/libide/symbols/ide-code-indexer.c
@@ -134,11 +134,18 @@ ide_code_indexer_index_file_async (IdeCodeIndexer      *self,
                                    GAsyncReadyCallback  callback,
                                    gpointer             user_data)
 {
+  g_autoptr(GFile) copy = NULL;
+
   g_return_if_fail (IDE_IS_MAIN_THREAD ());
   g_return_if_fail (IDE_IS_CODE_INDEXER (self));
   g_return_if_fail (G_IS_FILE (file));
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
+#ifdef IDE_ENABLE_TRACE
+  /* Simplify leak detection */
+  file = copy = g_file_dup (file);
+#endif
+
   return IDE_CODE_INDEXER_GET_IFACE (self)->index_file_async (self, file, build_flags, cancellable, 
callback, user_data);
 }