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By Design
Votes
1
Found in
2018.4
2019.3.0f3
2020.2
Issue ID
1216172
Regression
No
NativeArray safety checks within the Job System are incorrectly carried over into a job using GCHandle to access the same data
Reproduction steps:
1. Open the attached project ("case_1216172-JobSystemSafetyCheckBugReport.zip")
2. Open the repro scene ("SampleScene")
3. Enter Play Mode
4. Inspect Console
Expected result: No errors are thrown
Actual result: "InvalidOperationException: The NativeArray<Int32> UNKNOWN_JOB_FIELD has been declared as [ReadOnly] in the job UNKNOWN_JOB, but you are writing to it." error is thrown
Reproducible with: 2018.4.18f1, 2019.3.5f1, 2020.1.0b1, 2020.2.a2
Couldn't test with 2017.4 (some methods were not supported yet)
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Resolution Note:
The jobs safety system does not support passing GCHandles to NativeArray data; it can't (and won't) correctly track accesses through the GCHandle.