[Critical] Verse SpatialMath methods cause ErrRuntime_InfiniteLoop and crash servers

General Issues and Bug Reporting
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1

Summary

After 36.00 update my map started crashing sometimes with error logs pointing to Verse native functions, for ex vector3.Length() :

Verse unrecoverable error: ErrRuntime_InfiniteLoop: The runtime terminated prematurely because Verse code was running in an infinite loop. (Computation timed out - see log for stack trace) Truncated callstack follows: SpatialMath:(/Verse.org/SpatialMath:)operator'.Length'(:(/Verse.org/SpatialMath:)vector3,:tuple()) (Unknown source) (Source: Unknown(0,0, 0,0)) (/Verse.org/SpatialMath:)operator'.MakeUnitVector'(:(/Verse.org/SpatialMath:)vector3,:tuple()) (Source: SpatialMath/Vector3.native.verse(99,16, 100,17)) (/beloud-creative@fortnite.com/Pekao?nk/VPets:)GetPetPosAndRotation(:(/Verse.org/SpatialMath:)transform,:(/Verse.org/SpatialMath:)transform) (Source: VPets/pet_math.verse(37,119, 38,120)) InitPlayerAsync(:(/Verse.org/Simulation:)agent,:(/Verse.org/Verse:)event(tuple())) (Source: VPets/pets.verse(73,58, 74,59))

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Verse

Steps to Reproduce

Please check error logs of map public code: 8754-6289-4338

Expected Result

No crashes when using SpatialMath functions

Observed Result

Rare crashes when using SpatialMath functions

Platform(s)

PC and probably others

Island Code

8754-6289-4338

3

Hi @Kamyker, could you please send us your log right after you reproduce this? We’re having trouble getting a repro here.

4

Logs as FortniteGame.log ?

It’s a bit tricky to reproduce as it doesn’t happen very often. Seems to occur more often after player gets a pet (from rebirths) that then follows player all the time making a lot of math calculations.

5

Yes, if you could, after you get the next repro. Thank you!

6

(post deleted by author)

7

This makes no sense, I wouldn’t be able to compile the code and release the map…

Anyway it’s not true, new SpatialMath doesn’t use <decides> anymore, I already tested all edge cases and they don’t crash. It’s completely irrelevant what you wrote there.
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Old MakeUnitVector from Templorarty/SpatialMath also causes the crash with <decides> context:

Verse unrecoverable error: ErrRuntime_InfiniteLoop: The runtime terminated prematurely because Verse code was running in an infinite loop. (Computation timed out - see log for stack trace) Truncated callstack follows: SpatialMath:SpatialMath_vector3$OverrideFactory (Unknown source) (Source: Unknown(0,0, 0,0)) (/UnrealEngine.com/Temporary/SpatialMath:)operator'.IsFinite'(:(/UnrealEngine.com/Temporary/SpatialMath:)vector3,:tuple()) (Source: SpatialMath/Vector3_Deprecated.native.verse(149,65, 150,66)) (/UnrealEngine.com/Temporary/SpatialMath:)operator'.MakeUnitVector'(:(/UnrealEngine.com/Temporary/SpatialMath:)vector3,:tuple()) (Source: SpatialMath/Vector3_Deprecated.native.verse(83,14, 84,15)) InitPlayerAsync(:(/Verse.org/Simulation:)agent,:(/Verse.org/Verse:)event(tuple())) (Source: VPets/pets.verse(85,49, 86,50))

Other methods from SpatialMath also cause the crash:

FromTransform:

Verse unrecoverable error: ErrRuntime_InfiniteLoop: The runtime terminated prematurely because Verse code was running in an infinite loop. (Computation timed out - see log for stack trace) Truncated callstack follows: SpatialMath:(/UnrealEngine.com/Temporary/SpatialMath:)FromTransform(:(/UnrealEngine.com/Temporary/SpatialMath:)transform) (Unknown source) (Source: Unknown(0,0, 0,0)) InitPlayerAsync(:(/Verse.org/Simulation:)agent,:(/Verse.org/Verse:)event(tuple())) (Source: VPets/pets.verse(72,42, 73,43))

Length():

Verse unrecoverable error: ErrRuntime_InfiniteLoop: The runtime terminated prematurely because Verse code was running in an infinite loop. (Computation timed out - see log for stack trace) Truncated callstack follows: SpatialMath:(/Verse.org/SpatialMath:)operator'.Length'(:(/Verse.org/SpatialMath:)vector3,:tuple()) (Unknown source) (Source: Unknown(0,0, 0,0)) (/Verse.org/SpatialMath:)operator'.MakeUnitVector'(:(/Verse.org/SpatialMath:)vector3,:tuple()) (Source: SpatialMath/Vector3.native.verse(99,16, 100,17)) (/beloud-creative@fortnite.com/Pekao?nk/VPets:)GetPetPosAndRotation(:(/Verse.org/SpatialMath:)transform,:(/Verse.org/SpatialMath:)transform) (Source: VPets/pet_math.verse(37,119, 38,120)) InitPlayerAsync(:(/Verse.org/Simulation:)agent,:(/Verse.org/Verse:)event(tuple())) (Source: VPets/pets.verse(73,58, 74,59))

Adding 2 vectors:

Verse unrecoverable error: ErrRuntime_InfiniteLoop: The runtime terminated prematurely because Verse code was running in an infinite loop. (Computation timed out - see log for stack trace) Truncated callstack follows: SpatialMath:(/Verse.org/SpatialMath:)operator'+'(:(/Verse.org/SpatialMath:)vector3,:(/Verse.org/SpatialMath:)vector3) (Unknown source) (Source: Unknown(0,0, 0,0)) (/beloud-creative@fortnite.com/Pekao?nk/VPets:)GetPetPosAndRotation(:(/Verse.org/SpatialMath:)transform,:(/Verse.org/SpatialMath:)transform) (Source: VPets/pet_math.verse(43,24, 44,25)) InitPlayerAsync(:(/Verse.org/Simulation:)agent,:(/Verse.org/Verse:)event(tuple())) (Source: VPets/pets.verse(73,58, 74,59))
9

FORT-933769 has been added to our ‘To Do’ list. Someone’s been assigned this task.