# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1241463840 0
# Node ID 90422d071d3f27e110515dc9d5d53dcb3dbb12bc
# Parent  c85101146a783458a52bc9b89dc9bf6321146385
do not free buffer with cache header before it would be written,
it seems this affected header only FastCGI responses only:
proxied header only responses were cached right

diff --git a/src/event/ngx_event_pipe.c b/src/event/ngx_event_pipe.c
--- a/src/event/ngx_event_pipe.c
+++ b/src/event/ngx_event_pipe.c
@@ -397,7 +397,7 @@ ngx_event_pipe_read_upstream(ngx_event_p
 
         p->free_raw_bufs = p->free_raw_bufs->next;
 
-        if (p->free_bufs) {
+        if (p->free_bufs && p->buf_to_file == NULL) {
             for (cl = p->free_raw_bufs; cl; cl = cl->next) {
                 if (cl->buf->shadow == NULL) {
                     ngx_pfree(p->pool, cl->buf->start);