Undefined index in WP_Widget_Search
|Reported by:||SergeyBiryukov||Owned by:|
While switching themes and moving around widgets for #17979, at some point I noticed that adding a Search widget results in error on the frontend:
Notice: Undefined index: title in wp-includes/default-widgets.php on line 180
I can't reproduce the issue again, but Google shows thousands of results with this exact message.
Most of the default widgets already have empty() checks for title, so WP_Widget_Search and WP_Nav_Menu_Widget should have them too.