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Graph/dangling-async-after-destroy

AntiPattern

Dangling Async After Destroy

dangling-async-after-destroy

Async tasks and effect timers keep running after a Component or GameObject is destroyed or while a schedule is interrupted, causing mid-play cutoffs, queued work that never drains, and hidden warmup/extra ticks that waste frames and confuse visualization logic.

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Public graph metadata

Updated6/23/2026

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30 linked nodes

MATCHESSolution

Use a cleanup function to clear the timeout, or simulate latency with Chrome DevTools throttling or MSW delay instead

MATCHESSolution

You need to make sure that component that needs that deleted resource is no longer is rendering. Tension: then you set the state that hides that element at the same point where you invalidate the query.

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rendering the rows as a non complex component like a spinner or something — my laggy components were loading in as i scrolled etc. Tension: excessive blanking of the page. Outcome: using useEffect to determine if it is fully rendered, you can resolve most of the major blanking issues.

MATCHESSolution

Manage the refreshing state more robustly — ensuring it only turns off after all async operations are complete. Tension: remove the arbitrary timeout. Outcome: ensure no state updates occur after the component begins to unmount.

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Disable retry — If the issue persists. Tension: it could be because the sdk is getting an error and appear to be hanging while it's retrying. Outcome: You could try disabling the retry and check if there is an error.

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single worker running async loop. Outcome: So you have a single worker running async loop and you block that loop.

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Move the persistence/cleanup logic into code that runs at the end of the background task (or otherwise extend lifecycle explicitly for the background task), rather than relying on the request-scoped `asynccontextmanager` teardown for those updates.

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any time you have an I/O bound process with lots of idle time — waiting for user input, waiting for a TLS handshake. Tension: wrapping it in an async task can let other code run.

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bound it with a "progress ceiling" — a process emitting bytes but making NO semantic progress. Tension: a process emitting bytes but making NO semantic progress (livelock) would be shielded forever. Outcome: re-arms recovery after a long no-progress window even while bytes flow.

MATCHESSolution

An async function was passed to useActionState.

MATCHESSolution

Use a self-scheduling setTimeout (or otherwise manage interval setup/cleanup) so the next tick is scheduled only after the state update, with an exit condition like `seconds > 0` to stop when it reaches zero.

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To stop the Service from Activity — when the activity is destroyed. Tension: the service appears to remain active—its notification stays visible.

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future.cancel(true); — httpHardTimeoutScheduler.schedule(() -> {. Tension: if (!future.isDone() && !future.isCancelled()). Outcome: keep your latency low on your side of the wire.

MATCHESSolution

To get the effect you want. Tension: you're not resuming the parent before you wait for the child!

MATCHESSolution

Use Component.Task (TaskSource) for all async work inside components — inside components. Tension: it auto-cancels when the component is destroyed.

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DebugOverlay (available on any Component or GameObject) for debug visualization. Tension: Unity's Debug.DrawLine/DrawRay don't exist. Outcome: Draw a sphere at a world position for 0.1 seconds.

MATCHESSolution

Add TemporaryEffect to GameObjects that should auto-destroy after effects finish — In the scene editor: add TemporaryEffect component to your effect prefab. Outcome: BecomeOrphan = true: if parent is destroyed, detach and finish playing.

MATCHESSolution

after mutating the property. Tension: Per-component refresh is broken. Outcome: always refresh the whole GameObject.

MATCHESSolution

CollectSyncState() iterates all components, finds [Sync] properties without [Property], serializes them to JSON — in SaveSystem.cs. Tension: Use JSON serialization first, with a ByteStream/BytePack fallback for types that don't serialize cleanly to JSON. Outcome: RestoreSyncState() is called before RestoreNetworkOwnership() in the Load path.

MATCHESSolution

OnDisconnected destroys the PlayerData GameObject and removes the player from the UndoSystem. — GameManager implements INetworkListener. Tension: Clean up undo stacks. Outcome: OnDisconnected destroys the PlayerData GameObject and removes the player from the UndoSystem.

MATCHESSolution

call `body.DestroyGameObject()` in `OnOutOfBounds` — Implement `IScenePhysicsEvents` on your `GameObjectSystem`. Tension: prevents unbounded accumulation of out-of-world objects. Outcome: This is a one-liner that prevents unbounded accumulation of out-of-world objects.

MATCHESSolution

Use a two-level system: `ScheduleBase` (a sequence of tasks with a `ShouldCancel()` interrupt check) and `TaskBase` (a single atomic action with `OnStart/OnUpdate/OnEnd`). — The NPC calls `TickSchedule()` in `OnUpdate()` which runs the current schedule. Tension: When a task returns `Success`, the schedule advances to the next task. When `ShouldCancel()` returns true, the schedule returns `Interrupted` and the NPC can select a new schedule. Outcome: Built-in tasks: MoveTo, LookAt, Wait, Say, FireWeapon, PickUpProp, DropProp.

MATCHESSolution

CancellationTokenSource pattern allows cancelling mid-reload — In `OnReloadStart`. Tension: when switching weapons or firing. Outcome: cancel any existing reload, create a new CTS, set `isReloading = true`, then `await ReloadAsync(token)`.

MATCHESSolution

Use ClutterComponent for GPU-instanced environmental detail scattering: — From code — invalidate tiles when terrain changes:. Outcome: Regenerate all clutter.

MATCHESSolution

Cache schedules in a `Dictionary<Type, ScheduleBase>`. Tension: if `ActiveSchedule` is running, keep ticking it; otherwise call `GetSchedule()`. Outcome: Call `EndCurrentSchedule()` on damage to interrupt.

MATCHESSolution

Track objects in `OnPostSpawn` and `OnPostToolAction` events. Outcome: Count by iterating only the player's list, pruning destroyed objects lazily during the count.

MATCHESSolution

Count by iterating only the player's list. Tension: pruning destroyed objects lazily during the count. Outcome: no separate cleanup pass needed.

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Cache in OnAwake — Key s&box performance patterns from the optimizer skill:. Tension: GetComponent every frame. Outcome: Physics work in OnFixedUpdate.

MATCHESSolution

Resolved activity IDs to visible renderer IDs before queueing pulses — pulse-only animation. Outcome: paused the renderer when idle.

MATCHESSolution

Record original scene objects on startup — CleanupSystem Component. Tension: Efficient batch destruction.

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