The Editor does not recognize code errors in generic classes when using C# Source Generator to generate serialization code

Unity: Scripting Buildtime

Won't Fix

6.6.X

6.5.X

6.4.X

6.3.X

6.0.X

The issue appears to stem from the source generator producing empty output, resulting in no generated code being included in the final assembly. Since the generator executes but does not emit valid content, the compiler behaves as expected and no fix is required on our side.

Reproduction steps:
1. Open the attached “IN-129952“ project
2. Open the Test Runner (Window > General > Test Runner)
3. Try to run the ValueDictionaryTests.CanSerialize test
4. Observe the test results

Actual result: The test runs and fails
Expected result: The code does not compile and the test can’t be ran

Reproducible with: 6000.0.68f1, 6000.3.10f1, 6000.4.0b10, 6000.5.0a7
Couldn’t test with: 2023.1.0a5 (Invalid dependencies for custom packages)

Reproducible on: Windows 11 (by reporter), macOS 26.3
Not reproducible on: No other environments tested

Note: This issue reproduces only with generic classes, with regular classes the errors are printed in the Console and prevent compilation

The Editor does not recognize code errors in generic classes when using C# Source Generator to generate serialization code

Unity: Scripting Buildtime

Won't Fix

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

The Editor does not recognize code errors in generic classes when using C# Source Generator to generate serialization code

Unity: Scripting Buildtime

Statuses

Won't Fix

Resolution Notes

6.6.XWon't FixThe issue appears to stem from the source generator producing empty output, resulting in no generated code being included in the final assembly. Since the generator executes but does not emit valid content, the compiler behaves as expected and no fix is required on our side.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?