PHP error when replying to a comment – weird

This is most weird so any help in being able to track it down would be fantastic.

I get the following error when replying to an existing comment.

Warning: extract() [function.extract]: First argument should be an array in /home/rastarr/public_html/gajwp/wp-includes/pluggable.php on line 216

Warning: Cannot modify header information - headers already sent by (output started at /home/rastarr/public_html/gajwp/wp-includes/pluggable.php:216) in /home/rastarr/public_html/gajwp/wp-includes/pluggable.php on line 881

Making comments seems to be fine but not when replying to a comment.

Here’s the debug snippet of the activity relating to the event, in case it actually highlights something that I don’t understand:

02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome supercache dir: /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome No wp-cache file exists. Must generate a new one.
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome In WP Cache Phase 2
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Setting up WordPress actions
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Created output buffer
02:26:24 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Output buffer callback
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Not caching for known user.
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Cache is not enabled. Sending buffer to browser.
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome wp_cache_shutdown_callback: collecting meta data.
02:26:29 /top-4-reasons-han-solo-suffered-bad-boy-syndrome Did not write meta file: wp-cache-6feb3b18bd457e758c305faf6c2018db.meta ** *1* *1*
02:27:19 /top-4-reasons-han-solo-suffered-bad-boy-syndrome?replytocom=2821 Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:27:19 /top-4-reasons-han-solo-suffered-bad-boy-syndrome?replytocom=2821 Non empty GET request. Caching disabled on settings page.
02:27:20 /top-4-reasons-han-solo-suffered-bad-boy-syndrome?replytocom=2821 Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:27:20 /top-4-reasons-han-solo-suffered-bad-boy-syndrome?replytocom=2821 In WP Cache Phase 2
02:27:20 /top-4-reasons-han-solo-suffered-bad-boy-syndrome?replytocom=2821 Setting up WordPress actions
02:28:11 /wp-admin/admin-ajax.php?action=blc_dashboard_status&random=0.05839749818979989 Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:28:11 /wp-admin/admin-ajax.php?action=blc_dashboard_status&random=0.05839749818979989 Non empty GET request. Caching disabled on settings page.
02:28:12 /wp-admin/admin-ajax.php?action=blc_dashboard_status&random=0.05839749818979989 Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:28:12 /wp-admin/admin-ajax.php?action=blc_dashboard_status&random=0.05839749818979989 In WP Cache Phase 2
02:28:12 /wp-admin/admin-ajax.php?action=blc_dashboard_status&random=0.05839749818979989 Setting up WordPress actions
02:29:36 /wp-comments-post.php Cookie detected: wordpress_logged_in_339368835c8dcfba64887c27db9280e0
02:29:36 /wp-comments-post.php In WP Cache Phase 2
02:29:36 /wp-comments-post.php Setting up WordPress actions
02:29:36 /wp-comments-post.php Not caching POST request.
02:29:37 /wp-comments-post.php wp_cache_post_edit: Clearing cache for post 7778 on post edit.
02:29:37 /wp-comments-post.php wp_cache_post_change: comment detected. only deleting post page.
02:29:37 /wp-comments-post.php supercache dir: /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/
02:29:37 /wp-comments-post.php wp_cache_post_id_gc post_id: 7778 http://www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome clearing cache in /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/.
02:29:37 /wp-comments-post.php prune_super_cache: wp_cache_rebuild_or_delete( /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/index.html.gz )
02:29:37 /wp-comments-post.php rebuild_or_gc: rename to /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/index.html.gz.needs-rebuild
02:29:37 /wp-comments-post.php prune_super_cache: wp_cache_rebuild_or_delete( /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/index.html )
02:29:37 /wp-comments-post.php rebuild_or_gc: rename to /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome/index.html.needs-rebuild
02:29:37 /wp-comments-post.php wp_cache_post_id_gc clearing cache in /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com/top-4-reasons-han-solo-suffered-bad-boy-syndrome//page/.
02:29:37 /wp-comments-post.php wp_cache_post_id_gc clearing cache in /home/rastarr/public_html/gajwp/wp-content/cache/supercache/www.geekandjock.com//page/.
02:29:37 /wp-comments-post.php wp_cache_post_edit: draft post, not deleting any cache files.
02:29:37 /wp-comments-post.php wp_cache_post_edit: draft post, not deleting any cache files.
02:29:37 /wp-comments-post.php wp_cache_post_edit: draft post, not deleting any cache files.
02:29:37 /wp-comments-post.php wp_cache_post_change: Already processed post 7778.
02:29:37 /wp-comments-post.php Post 7778 changed. Update cache.
02:29:37 /wp-comments-post.php wp_cache_post_change: Already processed post 7778.

Even more odd is that the reply is processed and enters the comment stream for the site. An email is sent using the plugin Comment Reply Notification as well.

The error line in pluggable.php is pointing to wp_mail code:

extract( apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) ) );
and line 881 points to the line:
header("Location: $location", true, $status);
in this function:

if ( !function_exists('wp_redirect') ) :
/**
 * Redirects to another page.
 *
 * @since 1.5.1
 * @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.
 *
 * @param string $location The path to redirect to
 * @param int $status Status code to use
 * @return bool False if $location is not set
 */
function wp_redirect($location, $status = 302) {
	global $is_IIS;

	$location = apply_filters('wp_redirect', $location, $status);
	$status = apply_filters('wp_redirect_status', $status, $location);

	if ( !$location ) // allows the wp_redirect filter to cancel a redirect
		return false;

	$location = wp_sanitize_redirect($location);

	if ( !$is_IIS && php_sapi_name() != 'cgi-fcgi' )
		status_header($status); // This causes problems on IIS and some FastCGI setups

	header("Location: $location", true, $status);
}
endif;

Any ideas anyone … anyone?
Martin

http://wordpress.org/extend/plugins/wp-super-cache/