What causes a Godot object-deleted-while-emitting error?

A signal handler freed an object (often the emitter) with free() during emission, but the engine is still iterating connections, so it errors on the deleted object.

How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix “Object was deleted while emitting a signal” in Godot

Quick answer: Use queue_free instead of free so deletion is deferred to the end of the frame, and avoid freeing the emitter or connected objects synchronously inside a signal handler.

This error means something was freed mid-signal. Deferring the free with queue_free fixes it. Here is how.

How to fix it

1. Use queue_free, not free

queue_free defers deletion until the end of the frame, after signal emission completes. free deletes immediately, which is unsafe during emission. Use queue_free for nodes freed in response to signals.

2. Do not free the emitter synchronously

Freeing the object that is currently emitting (or another connected object) mid-handler corrupts the emission loop. Defer the free, or restructure so the deletion happens after the signal finishes.

3. Disconnect before freeing if needed

If a freed object had connections, queue_free handles cleanup, but for manual lifetimes disconnect signals first so nothing calls into a half-deleted object during emission.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every Godot error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.

The bug you can't reproduce isn't gone — it's just invisible until you capture it from the player's device.