nginx 0.1.38 *) Feature: the "limit_rate" directive is supported in in proxy and FastCGI mode. *) Feature: the "X-Accel-Limit-Rate" response header line is supported in proxy and FastCGI mode. *) Feature: the "break" directive. *) Feature: the "log_not_found" directive. *) Bugfix: the response status code was not changed when request was redirected by the ""X-Accel-Redirect" header line. *) Bugfix: the variables set by the "set" directive could not be used in SSI. *) Bugfix: the segmentation fault may occurred if the SSI page has more than one remote subrequest. *) Bugfix: nginx treated the backend response as invalid if the status line in the header was transferred in two packets; bug appeared in 0.1.29. *) Feature: the "ssi_types" directive. *) Feature: the "autoindex_exact_size" directive. *) Bugfix: the ngx_http_autoindex_module did not support the long file names in UTF-8. *) Feature: the IMAP/POP3 proxy.

--- a/src/event/ngx_event_pipe.c
+++ b/src/event/ngx_event_pipe.c
@@ -182,7 +182,8 @@ static ngx_int_t ngx_event_pipe_read_ups
 
             } else if (!p->cachable
                        && p->downstream->data == p->output_ctx
-                       && p->downstream->write->ready)
+                       && p->downstream->write->ready
+                       && !p->downstream->write->delayed)
             {
                 /*
                  * if the bufs are not needed to be saved in a cache and
@@ -461,7 +462,8 @@ static ngx_int_t ngx_event_pipe_write_to
         }
 
         if (p->downstream->data != p->output_ctx
-            || !p->downstream->write->ready)
+            || !p->downstream->write->ready
+            || p->downstream->write->delayed)
         {
             break;
         }