ngx_http_set_exten() is always successful since 0.3.46
diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
index dbe6c34..ad9d88b 100644
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -1074,11 +1074,7 @@
             return;
         }
 
-        if (ngx_http_set_exten(r) != NGX_OK) {
-            e->ip = ngx_http_script_exit;
-            e->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
-            return;
-        }
+        ngx_http_set_exten(r);
     }
 
     e->ip += sizeof(ngx_http_script_regex_end_code_t);