nginx 0.8.33 *) Security: now nginx/Windows ignores trailing spaces in URI. Thanks to Dan Crowley, Core Security Technologies. *) Security: now nginx/Windows ignores short files names. Thanks to Dan Crowley, Core Security Technologies. *) Change: now keepalive connections after POST requests are not disabled for MSIE 7.0+. Thanks to Adam Lounds. *) Workaround: now keepalive connections are disabled for Safari. Thanks to Joshua Sierles. *) Bugfix: if a proxied or FastCGI request was internally redirected to another proxied or FastCGI location, then $upstream_response_time variable may have abnormally large value; the bug had appeared in 0.8.7. *) Bugfix: a segmentation fault might occur in a worker process, while discarding a request body; the bug had appeared in 0.8.11.

--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -366,6 +366,7 @@ ngx_http_upstream_create(ngx_http_reques
         r->main->count++;
         ngx_http_upstream_cleanup(r);
         *u->cleanup = NULL;
+        u->cleanup = NULL;
     }
 
     u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));
@@ -2856,6 +2857,7 @@ ngx_http_upstream_finalize_request(ngx_h
 
     if (u->cleanup) {
         *u->cleanup = NULL;
+        u->cleanup = NULL;
     }
 
     if (u->resolved && u->resolved->ctx) {