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Fixed in 2021.3.17f1



Found in


Issue ID




Crash on JoinImpl<core::basic_string<char,core::StringStorageDefault<char> > > when installing HDRP package after removing it



Reproduction steps:
1. Open the attached “CrashRepro” project
2. Click Window > Package Manager
3. Select Unity Registry
4. Search “High Definition RP”
5. In the Packages dropdown, select “High Definition RP” package”
6. Click Remove
7. In the “Burst Package Has Been Removed” window, click “OK”
8. Click Install

Expected result: HighDefinitionRP package is installed
Actual result: Unity Editor crashes

Reproducible with: 12.1.7 (2021.3.9f1), 12.1.8 (2021.3.15f1)
Not reproducible with: 10.10.1 (2020.3.42f1), 12.1.7 (2021.3.8f1), 12.0.0 (2022.1.0a1), 13.1.9 (2022.1.24f1), 14.0.4 (2022.2.1f1), 15.0.2 (2023.1.0a22)

Reproducible on: Windows 11 Pro 22H2

First lines of the stack trace:

{noformat}0x00007FF6BD735050 (Unity) JoinImpl<core::basic_string<char,core::StringStorageDefault<char> > >
0x00007FF6BD738674 (Unity) core::JoinArray
0x00007FF6BD6DCBD6 (Unity) ComputeShaderKernelKey
0x00007FF6BE3CA907 (Unity) CompileKernelVariantJobForEach
0x00007FF6BD5742C0 (Unity) JobQueue::Exec{noformat}


* Reimport the project on every version
* Doesn’t crash with other packages

  1. Resolution Note (fix version 2021.3.17f1):

    Backported a fix for a crash when building variants produced an empty set

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