AnimationMixer: Validate ObjectID before blend in case the object was freed #85461
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Works around #85365, but it's likely only a partial fix. The proper fix would be to remove the Object pointer from the TrackCache and always go back to the ObjectID before doing operations like this.
Thanks @bitsawer for the help debugging.
I'd say this doesn't full address #85365 as there are many other cases where
t->object
is dereferenced without being sure it's valid. But for 4.2 this might be a suitable workaround for at least one known crash, until this is refactored for 4.3.I confirmed this fixes the crash in Liblast and in the MRPs of #85365.