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Fixed in 0.14.0
Votes
0
Found in [Package]
0.8.0 - preview.8
Issue ID
1262093
Regression
Yes
Crash when calling EntityManager.CreateEntity(new EntityArchetype(), 1, Allocator.Temp)
How to reproduce:
1. Open attached project "Case_1262093"
2. Press Play
Reproducible with: Entities: 0.8.0 - preview.8, 0.11.1 - preview.4(2019.4.4f1, 2020.1.0b16, 2020.2.0a18)
Not reproducible with: Entities: 0.0.12 - preview.24 (2018.4.25f1), 0.7.0 - preview.19 (2019.4.4f1, 2020.1.0b16, 2020.2.0a18)
First lines of the stack trace:
0x00007ffec523103e (592a0d624a81e04423678b58ab5bbc5) 24CFDDDB6D7CECAC
0x000001f7b58b83f4 (Mono JIT Code) (wrapper managed-to-native) object:wrapper_native_000001F7AD550160 (Unity.Entities.EntityComponentStore*,void*,Unity.Entities.Entity*,int)
0x000001f958d59f74 (Mono JIT Code) [EntityManagerChangeArchetype.interop.gen.cs:368] Unity.Entities.StructuralChange:_forward_mono_CreateEntity (Unity.Entities.EntityComponentStore*,void*,Unity.Entities.Entity*,int)
0x000001f958d59ec3 (Mono JIT Code) [EntityManagerChangeArchetype.interop.gen.cs:350] Unity.Entities.StructuralChange:CreateEntity (Unity.Entities.EntityComponentStore*,void*,Unity.Entities.Entity*,int)
0x000001f958d59e23 (Mono JIT Code) [EntityDataAccess.cs:490] Unity.Entities.EntityDataAccess:CreateEntity (Unity.Entities.EntityArchetype,Unity.Entities.Entity*,int)
Notes:
1. Does not reproduce with Burst Compilation disabled
2. Sometimes crashes instantly, other times you need to wait in Play Mode for the crash to occur
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Resolution Note (fix version 0.14.0):
Fixed in: Entities 0.14.0 - preview.18
The root issue here is that `new EntityArchetype()` returns an invalid value that you're not supposed to use. To get valid EntityArchetype values, you must call `EntityManager.CreateArchetype()` instead.
We unfortunately can't stop you from instantiating invalid values because a struct's default constructor cannot be overridden or hidden.
So our fix is that safety checks in CreateEntity() and SetArchetype() will now throw an exception if you pass the invalid EntityArchetype value.