Hard crash when sending/receiving ghost snapshots of child entities

Unity Engine
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1

Just thought I’d post my case on the forum.

  1. What happened
    Using netcube sample as a base, I added a child entity to the Cube, updated the component list, and generated the snapshot code. When I entered playmode, the editor crashed. This seems to happen when any child entity of an instantiated ghost is sending/receiving snapshots.

  2. How we can reproduce it using the example you attached
    Make sure the Netcube scene is loaded.
    Enter playmode.

Case 1265378.

2

I probably have the same issue since moving away from 2020.1.b10 to any higher version. Hard crash, and the editor.log contains this:

Obtained 256 stack frames.
#0  0x00000100000000 in (Unknown)
#1  0x0000018503a883 in  Unity.NetCode.GhostSendSystem`1/SerializeJob<NetworkGhostSerializerCollection>:Execute () {0x7f9a8da4a400} + 0x783 (0x18503a100 0x18503e62b) [0x139e42960 - Unity Child Domain]
#2  0x000001850394fb in  Unity.Jobs.IJobExtensions/JobStruct`1<Unity.NetCode.GhostSendSystem`1/SerializeJob<NetworkGhostSerializerCollection>>:Execute (Unity.NetCode.GhostSendSystem`1/SerializeJob<NetworkGhostSerializerCollection>&,intptr,intptr,Unity.Jobs.LowLevel.Unsafe.JobRanges&,int) {0x7f9a8ffecde0} + 0x1b (0x1850394e0 0x185039500) [0x139e42960 - Unity Child Domain]
#3  0x00000000000000 in (Unknown)
... (252 entries removed)
#2550x007f9b24a7e878 in (Unknown)
3

Seems like this is related to the NativeDisableContainerSafetyRestriction bug that is described here:

Changing NativeDisableContainerSafetyRestriction on the GhostSerializer fields to NativeDisableParallelForRestriction fixes it for me

3 Likes
4

Thank you so much, again! This fixes it for me as well. What a bug.

2 Likes