nginx 0.3.55 *) Feature: the "stub" parameter in the "include" SSI command. *) Feature: the "block" SSI command. *) Feature: the unicode2nginx script was added to contrib. *) Bugfix: if a "root" was specified by variable only, then the root was relative to a server prefix. *) Bugfix: if the request contained "//" or "/./" and escaped symbols after them, then the proxied request was sent unescaped. *) Bugfix: the $r->headers_in("Cookie") of the ngx_http_perl_module now returns all "Cookie" header lines. *) Bugfix: a segmentation fault occurred if "client_body_in_file_only on" was used and nginx switched to a next upstream. *) Bugfix: on some condition while reconfiguration character codes inside the "charset_map" may be treated invalid; bug appeared in 0.3.50.

--- a/src/http/ngx_http_header_filter_module.c
+++ b/src/http/ngx_http_header_filter_module.c
@@ -159,6 +159,8 @@ ngx_http_header_filter(ngx_http_request_
     ngx_table_elt_t           *header;
     ngx_http_core_loc_conf_t  *clcf;
 
+    r->header_sent = 1;
+
     if (r != r->main) {
         return NGX_OK;
     }