From c1844fb58ef01ad3c987fdacfc6a70c24f54fabf Mon Sep 17 00:00:00 2001
From: Yair Morgenstern <yairm210@hotmail.com>
Date: Sun, 4 Apr 2021 19:31:49 +0300
Subject: [PATCH] Fixed water improvement unique crash for mods with non
 existent improvements

---
 core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt b/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
index 2c3920e193..2dbb3fb73f 100644
--- a/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
+++ b/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
@@ -87,7 +87,7 @@ object UnitActions {
 
         val improvement = tile.getTileResource().improvement
 
-        if (tile.improvement == null
+        if (tile.improvement == null && tile.ruleset.tileImprovements.containsKey(improvement)
                 && unit.civInfo.tech.isResearched(tile.ruleset.tileImprovements[improvement]!!.techRequired!!))
             return UnitAction(UnitActionType.Create, "Create [$improvement]",
                     action = {