checked in the patches for the nginx 1.2.5 core.

patches/nginx-1.2.5-upstream_test_connect_kqueue.patch

@@ -0,0 +1,26 @@
+--- nginx-1.2.5/src/http/ngx_http_upstream.c	2012-08-06 10:34:08.000000000 -0700
++++ nginx-1.2.5-patched/src/http/ngx_http_upstream.c	2012-11-05 21:17:38.000000000 -0800
+@@ -1808,10 +1808,22 @@ ngx_http_upstream_test_connect(ngx_conne
+ 
+ #if (NGX_HAVE_KQUEUE)
+ 
++    ngx_event_t *ev;
++
+     if (ngx_event_flags & NGX_USE_KQUEUE_EVENT)  {
+         if (c->write->pending_eof) {
++            ev = c->write;
++
++        } else if (c->read->pending_eof) {
++            ev = c->read;
++
++        } else {
++            ev = NULL;
++        }
++
++        if (ev) {
+             c->log->action = "connecting to upstream";
+-            (void) ngx_connection_error(c, c->write->kq_errno,
++            (void) ngx_connection_error(c, ev->kq_errno,
+                                     "kevent() reported that connect() failed");
+             return NGX_ERROR;
+         }