Hang and memory spike (that doesn't go away) when you create an endless loop in AnimBP. Blueprints have a safeguard against this when you try to PIE with an endless loop, but I think the Animation Preview doesn't have this same safeguard.

Steps to Reproduce

1. Create a ThirdPerson Template project
2. Open the ThirdPerson_AnimBP
3. Set up the EventGraph like in the attached screenshot (Add a print string and make it loop with Set Speed
4. Compile the AnimBP

Result: Long hang and memory spike
Expected: A warning about the loop


Infinite loop was created, not an Engine bug

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Won't Fix
ComponentOLD - Anim
Affects Versions4.9.24.10
CreatedOct 27, 2015
ResolvedOct 31, 2015
UpdatedJul 14, 2021