nginx 0.3.50 *) Change: the "proxy_redirect_errors" and "fastcgi_redirect_errors" directives was renamed to the "proxy_intercept_errors" and "fastcgi_intercept_errors" directives. *) Feature: the ngx_http_charset_module supports the recoding from the single byte encodings to the UTF-8 encoding and back. *) Feature: the "X-Accel-Charset" response header line is supported in proxy and FastCGI mode. *) Bugfix: the "\" escape symbol in the "\"" and "\'" pairs in the SSI command was removed only if the command also has the "$" symbol. *) Bugfix: the "<!--" string might be added on some conditions in the SSI after inclusion. *) Bugfix: if the "Content-Length: 0" header line was in response, then in nonbuffered proxying mode the client connection was not closed.

--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -354,6 +354,9 @@ ngx_http_get_indexed_variable(ngx_http_r
         return &r->variables[index];
     }
 
+    r->variables[index].valid = 0;
+    r->variables[index].not_found = 1;
+
     return NULL;
 }