Skipping location rewrite phase for server null location.

src/http/modules/ngx_http_rewrite_module.c

diff --git a/src/http/modules/ngx_http_rewrite_module.c b/src/http/modules/ngx_http_rewrite_module.c
index 5164734..2ef2440 100644
--- a/src/http/modules/ngx_http_rewrite_module.c
+++ b/src/http/modules/ngx_http_rewrite_module.c
@@ -135,10 +135,22 @@
 static ngx_int_t
 ngx_http_rewrite_handler(ngx_http_request_t *r)
 {
+    ngx_int_t                     index;
     ngx_http_script_code_pt       code;
     ngx_http_script_engine_t     *e;
+    ngx_http_core_srv_conf_t     *cscf;
+    ngx_http_core_main_conf_t    *cmcf;
     ngx_http_rewrite_loc_conf_t  *rlcf;
 
+    cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
+    cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
+    index = cmcf->phase_engine.location_rewrite_index;
+
+    if (r->phase_handler == index && r->loc_conf == cscf->ctx->loc_conf) {
+        /* skipping location rewrite phase for server null location */
+        return NGX_DECLINED;
+    }
+
     rlcf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
 
     if (rlcf->codes == NULL) {