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Fixed in Unity 2018.3



Found in


Issue ID




[Scripted Importer] Editor crash on mono_object_unbox when reimporting an asset tied to a missing scripted importer

Asset Importers



Priority: 3Not yet prioritized for a release


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

Steps to reproduce:
1. Open the attached project ""
2. RMB on "Asset" -> Reimport
3. Observe the crash

Reproducible with: 2017.1.3p3, 2017.2.2p3, 2017.3.2f1, 2017.4.1f1
Not reproducible with: 2018.1.0a1, 2018.1.0f1, 2018.2.0b1

Errors are thrown:
"Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)"
"Assertion failed: Assertion failed on expression: 'm_ScriptCache != NULL && m_ScriptCache->klass'"

Comments (1)

  1. B6cc06faf9b393d7cc1838bdf45cb740?d=mm


    Jul 31, 2018 09:49

    I'm having the same issue in 2018.2.0f2

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