From 316567898e5e9286c2296ec6687903ae1b50aff9 Mon Sep 17 00:00:00 2001
From: pantor <lars.berscheid@online.de>
Date: Sat, 16 Jan 2021 15:38:14 +0100
Subject: [PATCH] add size check in get_argument_vector

---
 include/inja/renderer.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/inja/renderer.hpp b/include/inja/renderer.hpp
index 688a912..8b3a270 100644
--- a/include/inja/renderer.hpp
+++ b/include/inja/renderer.hpp
@@ -119,6 +119,10 @@ class Renderer : public NodeVisitor  {
 
   template<bool throw_not_found=true>
   Arguments get_argument_vector(size_t N, const AstNode& node) {
+    if (json_eval_stack.size() < N) {
+      throw_renderer_error("function needs " + std::to_string(N) + " variables, but has only found " + std::to_string(json_eval_stack.size()), node);
+    }
+
     Arguments result {N};
     for (size_t i = 0; i < N; i += 1) {
       result[N - i - 1] = json_eval_stack.top();