Warning: preg_match():

Just happened after the update listed as –

Warning: preg_match(): Unknown modifier ‘1’ in /home1/benjyoun/public_html/wp-includes/class-wp.php on line 207

Appears on the ‘page’ panel and appears on top of some pages.

Already deactivated the theme, switched to original and deactivated plug ins, same error.

line 207 displays as –

} else {
				foreach ( (array) $rewrite as $match => $query ) {
					// If the requesting file is the anchor of the match, prepend it to the path info.
					if ( ! empty($req_uri) && strpos($match, $req_uri) === 0 && $req_uri != $request )
						$request_match = $req_uri . '/' . $request;

					if ( preg_match("#^$match#", $request_match, $matches) ||
						preg_match("#^$match#", urldecode($request_match), $matches) ) {

						if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
							// This is a verbose page match, let's check to be sure about it.
							$page = get_page_by_path( $matches[ $varmatch[1] ] );
							if ( ! $page ) {
						 		continue;
							}

							$post_status_obj = get_post_status_object( $page->post_status );
							if ( ! $post_status_obj->public && ! $post_status_obj->protected
								&& ! $post_status_obj->private && $post_status_obj->exclude_from_search ) {
								continue;
							}
						}

						// Got a match.
						$this->matched_rule = $match;
						break;
					}
				}