Undefined variable: nav_menu_id in /wp-includes/nav-menu.php on line 195

[chipbennett]

To reproduce:

1. Delete an existing nav menu

Error (PHP notice):

Notice: Undefined variable: nav_menu_id in /xxxxxx/wp-includes/nav-menu.php on line 195

​Core code:

      // Remove this menu from any locations.
193	        $locations = get_theme_mod( 'nav_menu_locations' );
194	        foreach ( (array) $locations as $location => $menu_id ) {
195	                if ( $menu_id == $nav_menu_id )
196	                        $locations[ $location ] = 0;
197	        }
198	        set_theme_mod( 'nav_menu_locations', $locations );

Offending line:

if ( $menu_id == $nav_menu_id )

...but $nav_menu_id is not defined in the function.

[SergeyBiryukov]

Introduced in [23897].

[c3mdigital]

Replying to SergeyBiryukov:

Should have refreshed the page. Didn't see your patch.

[SergeyBiryukov]

In 23941:

Use correct variable. fixes #24014. see #23119.