From 1ca84f3b5d6af483dd4ce54d345c9cb9423c30f0 Mon Sep 17 00:00:00 2001
From: RecursiveVision <66801010+RecursiveVision@users.noreply.github.com>
Date: Thu, 14 Sep 2023 17:24:12 -0400
Subject: [PATCH] Fix #9772

---
 CvGameCoreDLL_Expansion2/CvDiplomacyAI.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CvGameCoreDLL_Expansion2/CvDiplomacyAI.cpp b/CvGameCoreDLL_Expansion2/CvDiplomacyAI.cpp
index d64c8a25b7..b2ea69dcc5 100644
--- a/CvGameCoreDLL_Expansion2/CvDiplomacyAI.cpp
+++ b/CvGameCoreDLL_Expansion2/CvDiplomacyAI.cpp
@@ -54925,8 +54925,11 @@ int CvDiplomacyAIHelpers::GetCityLiberationValue(CvCity* pCity, PlayerTypes eLib
 
 	if (!bHisGainIsOurOwn)
 	{
+		// Need to check if the opponent is alive, calling this for an unmet player can crash the game
+		StrengthTypes eOpponentStrength = GET_PLAYER(eNewOwner).isAlive() ? pDiplo->GetMilitaryStrengthComparedToUs(eNewOwner) : STRENGTH_PATHETIC;
+
 		// DECREASE if opponent is big and nasty.
-		switch (pDiplo->GetMilitaryStrengthComparedToUs(eNewOwner))
+		switch (eOpponentStrength)
 		{
 		case NO_STRENGTH_VALUE:
 			UNREACHABLE(); // Strengths are supposed to have been evaluated by this point.