[gnome-builder] buffer: hold reference to resolvers across operation

[Christian Hergert <chergert src gnome org>]

commit f9acd8d59a0486d749924228f8134da4d6e3d944
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 3 02:29:14 2018 -0800

    buffer: hold reference to resolvers across operation

 src/libide/buffers/ide-buffer.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/libide/buffers/ide-buffer.c b/src/libide/buffers/ide-buffer.c
index efeff15..888c681 100644
--- a/src/libide/buffers/ide-buffer.c
+++ b/src/libide/buffers/ide-buffer.c
@@ -174,8 +174,13 @@ lookup_symbol_get_extension (IdeExtensionSetAdapter *set,
                              gpointer                user_data)
 {
   LookUpSymbolData *data = user_data;
+  IdeSymbolResolver *resolver = (IdeSymbolResolver *)extension;
 
-  g_ptr_array_add (data->resolvers, IDE_SYMBOL_RESOLVER (extension));
+  g_assert (data != NULL);
+  g_assert (data->resolvers != NULL);
+  g_assert (IDE_IS_SYMBOL_RESOLVER (resolver));
+
+  g_ptr_array_add (data->resolvers, g_object_ref (resolver));
 }
 
 static gboolean
@@ -2731,10 +2736,11 @@ ide_buffer_get_symbol_at_location_async (IdeBuffer           *self,
   srcloc = ide_source_location_new (priv->file, line, line_offset, offset);
 
   data = g_slice_new0 (LookUpSymbolData);
-  data->resolvers = g_ptr_array_new_full (n_extensions, NULL);
+  data->resolvers = g_ptr_array_new_with_free_func (g_object_unref);
   data->location = ide_source_location_ref (srcloc);
 
   ide_extension_set_adapter_foreach (adapter, lookup_symbol_get_extension, data);
+  g_assert (data->resolvers->len > 0);
 
   g_task_set_task_data (task, data, (GDestroyNotify)lookup_symbol_task_data_free);