nginx 0.5.5 *) Change: the -v switch does not show compiler information any more. *) Feature: the -V switch. *) Feature: the "worker_rlimit_core" directive supports size in K, M, and G. *) Bugfix: the nginx.pm module now could be installed by an unprivileged user. *) Bugfix: a segmentation fault might occur if the $r->request_body or $r->request_body_file methods were used. *) Bugfix: the ppc platform specific bugs.

--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -678,9 +678,13 @@ ngx_http_variable_host(ngx_http_request_
             v->data = r->server_name.data;
         }
 
-    } else {
+    } else if (r->host_end) {
         v->len = r->host_end - r->host_start;
         v->data = r->host_start;
+
+    } else {
+        v->not_found = 1;
+        return NGX_OK;
     }
 
     v->valid = 1;