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Fixed in Unity 2019.1



Found in


Issue ID




TypeLoadException is thrown when selecting script

Editor - Other



Priority: 2Necessary for shipping a final release


Severity: 2Core functionality majorly impacted

How to reproduce:
1. Open the user-submitted project ("")
2. Select the Unit script in the Project Browser and observe errors in the Console
3. Create an empty game object and attach the "Unit" script to it
4. See greyed out inspector and warning message

Expected result: No TypeLoadException is thrown
Actual result: TypeLoadException is thrown

Reproduced in: 2019.1.0a10, 2018.3.0b11
Unable to test: 2018.2.17f1, 2018.1.9f2, 2017.4.16f1 (Couldn't test due to multiple project errors)

Note: Upon opening the project or entering Play Mode ReflectionTypeLoadExceptions are thrown - see case 1106606

Response avatar

Resolution Note:

The problem is that the asmdef is named System. This clashes with the System assembly from mscorlib. We now throw an exception if a predefined name is being used to avoid this issue in the future.

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