From babc3f5085da20bfe30b6052e5e43fa68ee22a3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Ke=C3=9Fler?= <git@maximilian-kessler.de>
Date: Sat, 5 Aug 2023 11:58:18 +0200
Subject: [PATCH] check for emptiness of draw pile when reverting turn

---
 game_state.hpp | 4 ++--
 main.cpp       | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/game_state.hpp b/game_state.hpp
index 197ea40..f4f66d2 100644
--- a/game_state.hpp
+++ b/game_state.hpp
@@ -144,8 +144,8 @@ namespace Hanabi {
 
         _card_positions[_hands[_turn][index]] = draw_pile;
 
-        // draw a new card if the draw pile is not empty
-        if (_draw_pile.back().card == _hands[_turn][index]) {
+        // put card back into draw pile (at the back)
+        if (!_draw_pile.empty() and _draw_pile.back().card == _hands[_turn][index]) {
             _draw_pile.back().multiplicity++;
         } else {
             _draw_pile.push_back({_hands[_turn][index], 1});
diff --git a/main.cpp b/main.cpp
index 1d6aece..9654795 100644
--- a/main.cpp
+++ b/main.cpp
@@ -54,7 +54,7 @@ void print_sizes() {
 }
 
 int main() {
-//  Hanabi::test_game();
+  Hanabi::test_game();
   Hanabi::download();
 
   return 0;