From ac768fe9f14ffd0ef0e64ebe717e5f4d459192a0 Mon Sep 17 00:00:00 2001
From: CaasGit <87243814+CaasGit@users.noreply.github.com>
Date: Fri, 12 Jul 2024 23:12:57 -0700
Subject: [PATCH] fix(SharedGunSystem): Return and debug log on CreateEffect.
 (#29656)

Sometimes CreateEffect is called on a Invalid Entity. This now causes
that to check, thus returning out and printing some hopefully helpful
logs to try to track down the real source of this issue.
---
 Content.Client/Weapons/Ranged/Systems/GunSystem.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Content.Client/Weapons/Ranged/Systems/GunSystem.cs b/Content.Client/Weapons/Ranged/Systems/GunSystem.cs
index ac5914d47c..7134227767 100644
--- a/Content.Client/Weapons/Ranged/Systems/GunSystem.cs
+++ b/Content.Client/Weapons/Ranged/Systems/GunSystem.cs
@@ -276,6 +276,14 @@ public sealed partial class GunSystem : SharedGunSystem
         if (!Timing.IsFirstTimePredicted)
             return;
 
+        // EntityUid check added to stop throwing exceptions due to https://github.com/space-wizards/space-station-14/issues/28252
+        // TODO: Check to see why invalid entities are firing effects.
+        if (gunUid == EntityUid.Invalid)
+        {
+            Log.Debug($"Invalid Entity sent MuzzleFlashEvent (proto: {message.Prototype}, user: {user})");
+            return;
+        }
+
         var gunXform = Transform(gunUid);
         var gridUid = gunXform.GridUid;
         EntityCoordinates coordinates;