From 3ecec3f4dc3be3d8281264b3efb703d1ce167fdb Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Fri, 1 Jan 2021 19:25:56 +0000
Subject: [PATCH] Correct to DTD, explicitly show empty output. See #2216

This shouldn't happen, so we'll print a "bug" error message so users
notify us.
---
 nse_main.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nse_main.cc b/nse_main.cc
index 7b028d420..b30ab48fd 100644
--- a/nse_main.cc
+++ b/nse_main.cc
@@ -521,6 +521,10 @@ void ScriptResult::write_xml() const
   output_str = get_output_str();
   if (!output_str.empty())
     xml_attribute("output", "%s", protect_xml(output_str).c_str());
+  else {
+    error("Bug in %s: no string output.", get_id());
+    xml_attribute("output", "%s", "");
+  }
 
   /* Any table output? */
   lua_rawgeti(L_NSE, LUA_REGISTRYINDEX, output_ref);