Added checks for character removal to a bunch of places. Some of these may not necessary, but at least MeleeWeapon, Projectile and Controller still accessed the user after the user had been removed.

Barotrauma/BarotraumaShared/Source/Items/Components/Holdable/MeleeWeapon.cs

@@ -52,7 +52,7 @@ namespace Barotrauma.Items.Components
 
         public override bool Use(float deltaTime, Character character = null)
         {
-            if (character == null || reloadTimer>0.0f) return false;
+            if (character == null || reloadTimer > 0.0f) return false;
             if (!character.IsKeyDown(InputType.Aim) || hitting) return false;
 
             //don't allow hitting if the character is already hitting with another weapon
@@ -172,6 +172,7 @@ namespace Barotrauma.Items.Components
         private void SetUser(Character character)
         {
             if (user == character) return;
+            if (user != null && user.Removed) user = null;
 
             if (user != null)
             {
@@ -213,6 +214,13 @@ namespace Barotrauma.Items.Components
 
         private bool OnCollision(Fixture f1, Fixture f2, Contact contact)
         {
+            if (user == null || user.Removed)
+            {
+                RestoreCollision();
+                hitting = false;
+                user = null;
+            }
+
             Character targetCharacter = null;
             Limb targetLimb = null;
             Structure targetStructure = null;

Barotrauma/BarotraumaShared/Source/Items/Components/Holdable/Propulsion.cs

@@ -58,13 +58,12 @@ namespace Barotrauma.Items.Components
         
         public override bool Use(float deltaTime, Character character = null)
         {
-            if (character == null) return false;
-            if (!character.IsKeyDown(InputType.Aim) || character.Stun>0.0f) return false;
+            if (character == null || character.Removed) return false;
+            if (!character.IsKeyDown(InputType.Aim) || character.Stun > 0.0f) return false;
 
             IsActive = true;
             useState = 0.1f;
 
-
             if (character.AnimController.InWater)
             {
                 if (usableIn == UsableIn.Air) return true;

Barotrauma/BarotraumaShared/Source/Items/Components/Holdable/RangedWeapon.cs

@@ -70,7 +70,7 @@ namespace Barotrauma.Items.Components
         
         public override bool Use(float deltaTime, Character character = null)
         {
-            if (character == null) return false;
+            if (character == null || character.Removed) return false;
             if (!character.IsKeyDown(InputType.Aim) || reloadTimer > 0.0f) return false;
             IsActive = true;
             reloadTimer = reload;
@@ -81,7 +81,7 @@ namespace Barotrauma.Items.Components
                 limbBodies.Add(l.body.FarseerBody);
             }
 
-            float degreeOfFailure = (100.0f - DegreeOfSuccess(character))/100.0f;
+            float degreeOfFailure = (100.0f - DegreeOfSuccess(character)) / 100.0f;
 
             degreeOfFailure *= degreeOfFailure;
 

Barotrauma/BarotraumaShared/Source/Items/Components/Holdable/RepairTool.cs

@@ -120,7 +120,7 @@ namespace Barotrauma.Items.Components
 
         public override bool Use(float deltaTime, Character character = null)
         {
-            if (character == null) return false;
+            if (character == null || character.Removed) return false;
             if (!character.IsKeyDown(InputType.Aim)) return false;
             
             float degreeOfSuccess = DegreeOfSuccess(character)/100.0f;

Barotrauma/BarotraumaShared/Source/Items/Components/Holdable/Throwable.cs

@@ -54,7 +54,7 @@ namespace Barotrauma.Items.Components
         public override void Update(float deltaTime, Camera cam)
         {
             if (!item.body.Enabled) return;
-            if (!picker.HasSelectedItem(item))
+            if (picker == null || picker.Removed || !picker.HasSelectedItem(item))
             {
                 IsActive = false;
                 return;