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Fixed in Unity 2018.3



Found in


Issue ID




[IL2CPP] Build fails using Development Build and Script Debugging




Priority: 3Not yet prioritized for a release


Severity: 1Crash, freeze, data loss, work stops

Reproduction steps:
1. Open one of two attached projects.
- (1GB but opens faster) (Recommended)
- (60MB, but takes a lot of time to recreate library)
2. Make sure IL2CPP scripting backend is set in the Player Settings.
3. Open Build Settings and check "Development Build" and "Script Debugging" checkboxes.
4. Build to macOS or iOS.

Actual behavior:
- Build fails.
- Full error log attached below.

Exception of type 'System.Exception' was thrown.
Failed running .../il2cppcore.dll
il2cpp.exe didn't catch exception: System.Exception: Exception of type 'System.Exception' was thrown.
Exception: .../il2cppcore.dll did not run properly!

Reproduced with:
2018.1.7f1, 2018.2.0b11, 2018.3.0a4

Comments (1)

  1. 803c9022ded79fc8dac3ea862e126d79?d=mm


    Apr 21, 2019 04:16

    I`m having the same problem with lastest unity 2019.1.02f

    Really weird to see such thing happening since 2018.17f1

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