Description:

  • $form['#node_edit_form'] is no longer set.
  • $form_state['build_info']['base_form_id'] will be set to 'node_form' instead.
  • Use hook_form_BASE_FORM_ID_alter() rather than hook_form_alter() to modify the node edit form. That is, use hook_form_node_form_alter().
Introduced in branch: 
1.0.x
Introduced in version: 
1.0.0
Impacts: 
Module developers
Related Github Issues: 
https://www.drupal.org/node/1353496
https://github.com/backdrop/backdrop-issues/issues/731