nginx 0.8.23 *) Security: now SSL/TLS renegotiation is disabled. Thanks to Maxim Dounin. *) Bugfix: listen unix domain socket did not inherit while online upgrade. *) Bugfix: the "unix:" parameter of the "set_real_ip_from" directive did not without yet another directive with any IP address. *) Bugfix: segmentation fault and infinite looping in resolver. *) Bugfix: in resolver. Thanks to Artem Bokhan.

--- a/src/http/ngx_http_copy_filter_module.c
+++ b/src/http/ngx_http_copy_filter_module.c
@@ -118,7 +118,7 @@ ngx_http_copy_filter(ngx_http_request_t 
         ctx->filter_ctx = r;
 
 #if (NGX_HAVE_FILE_AIO)
-        if (clcf->aio) {
+        if (ngx_file_aio && clcf->aio) {
             ctx->aio_handler = ngx_http_copy_aio_handler;
 #if (NGX_HAVE_AIO_SENDFILE)
             c->aio_sendfile = (clcf->aio == NGX_HTTP_AIO_SENDFILE);