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A comment on Game Engines on Steam: The Definitive Breakdown. Parent comment

Re:Game Engines on Steam: The Definitive Breakdown by jay_kyburz on Thursday September 02, 2021 @10:07PM (#28399679)
Yes, but read further, there is no method to test whether the object I pointed to still exists. You have to listen for a signal that the object is leaving the scene and manually clear your reference.
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Re:Game Engines on Steam: The Definitive Breakdown by nightowl_games on Friday September 03, 2021 @02:14AM (#28400974)
https://docs.godotengine.org/en/stable/classes/class_%40gdsc...

I'm making a complex Godot game.

'is_instance_valid' does what you are describing.

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Re:Game Engines on Steam: The Definitive Breakdown by jay_kyburz on Friday September 03, 2021 @03:10AM (#28401248)
Only in Debug builds. If you rely on it in a release build you will crash.

https://github.com/godotengine/godot-proposals/issues/1589 https://github.com/godotengine/godot/issues/41179

Reduz doesn't want the fix in release builds because the will be slower!

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Re:Game Engines on Steam: The Definitive Breakdown by nightowl_games on Friday September 03, 2021 @11:19AM (#28405384)
I don't understand. That's not what that PR says. That PR is about using == null. It offers no substantial information about is_instance_valid.
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Re:Game Engines on Steam: The Definitive Breakdown by jay_kyburz on Friday September 03, 2021 @04:33PM (#28409055)
Apologies, you might need to do some digging and research on your own.

On Oct 2 @RandomShaper said "is_instance_valid() was made thread-safe, but it's still not something you can trust. An object allocated at the same address as a freed one will report a false positive. That's, of course, considering that what you want to check is that your variable is still pointing to the object you assigned, and not to just some object, which I think is the case.

@reduz respoinded with "Ah that may be still the case of 3.2, but in 4.0 this function is 100% trustworthy"

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Re:Game Engines on Steam: The Definitive Breakdown by thaumasiotes on Friday September 03, 2021 @01:37AM (#28400747)
> there is no method to test whether the object I pointed to still exists

There probably is such a method, but you'd have to invoke it on the object, not on some other unrelated object.

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