Ticket #25408: 25408-list-table-headers-test.2.diff

src/wp-admin/includes/class-wp-list-table.php

@@ -850 +850 @@
          * @return array
          */
         protected function get_column_info() {
-                if ( isset( $this->_column_headers ) )
+                if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) && count( $this->_column_headers ) >= 4 ) {
                         return $this->_column_headers;
+                }
 
                 $columns = get_column_headers( $this->screen );
                 $hidden = get_hidden_columns( $this->screen );