Hello!

Here attaches a patch for the nginx 1.1.5 core to fix a long standing
bug in the ngx_http_named_location function.

I think we should clear out all the modules' contexts there just as in
ngx_http_internal_redirect, or we'll observe weird issues due to
left-over obsolete module contexts from the original request before
the jump. Here is a bad case in action:
http://www.ruby-forum.com/topic/2765027

Regards,
-agentzh

--- nginx-1.1.5/src/http/ngx_http_core_module.c 2011-09-27
19:14:02.000000000 +0800
+++ nginx-1.1.5-patched/src/http/ngx_http_core_module.c 2011-10-13
15:02:24.414550532 +0800
@@ -2542,6 +2542,9 @@
r->content_handler = NULL;
r->loc_conf = (*clcfp)->loc_conf;

+ /* clear the modules contexts */
+ ngx_memzero(r->ctx, sizeof(void *) * ngx_http_max_module);
+
ngx_http_update_location_config(r);

cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
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