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Fixed in Unity 2019.1



Found in


Issue ID




[IL2CPP] AOT exception is thrown when using a dynamic delegate call




Priority: 3Not yet prioritized for a release


Severity: 2Core functionality majorly impacted

Steps to reproduce:
1. Download
2. Build project for Standalone with IL2CPP backend
3. Launch the build app.

Expected results: Build doesn't throw any exceptions
Actual results: Build throw an exception

Reproduced with: 2019.1.0a8, 2018.3.0b9, 2018.2.16f1, 2018.1.9f2, 2017.4.15f1
Tested and reproduced with UWP and Windows Standalone platforms

Execution: System.ExecutionEngineException: Attempting to call method 'System.Collections.ICollection::get_Count' for which no ahead of time (AOT) code was generated.

Response avatar

Resolution Note:

IL2CPP did not properly handle virtual methods via delegate invoke in some cases. This change corrects that issue, so it should work in all cases.

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