Can't duplicate in vis_contents (#1811)

Co-authored-by: amylizzle <amylizzle@users.noreply.github.com>
OpenDreamProject · May 25, 2024 · 2ff5fae · 2ff5fae
1 parent dede5b1
commit 2ff5fae
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/OpenDreamRuntime/Objects/Types/DreamList.cs b/OpenDreamRuntime/Objects/Types/DreamList.cs
@@ -823,9 +823,13 @@ public override void SetValue(DreamValue key, DreamValue value, bool allowGrowth
     public override void AddValue(DreamValue value) {
         EntityUid entity;
         if (value.TryGetValueAsDreamObject<DreamObjectMovable>(out var movable)) {
+            if(_visContents.Contains(movable))
+                return; // vis_contents cannot contain duplicates
             _visContents.Add(movable);
             entity = movable.Entity;
         } else if (value.TryGetValueAsDreamObject<DreamObjectTurf>(out var turf)) {
+            if(_visContents.Contains(turf))
+                return; // vis_contents cannot contain duplicates
             _visContents.Add(turf);
             entity = EntityUid.Invalid; // TODO: Support turfs in vis_contents
         } else {