Reproduction steps:
1. Open “MinProject“
2. Enter Safe Mode if prompted (otherwise opening gets stuck at Completing Domain)
3. Observe the Console

Expected result: no SGICE003 error
Actual result: an SGICE003 error

Reproduced in: 1.0.0-pre.47 (2022.2.10f1, 2023.1.0b7, 2023.2.0a5)
Could not test in: 0.51.1-preview.21 (2020.3.46f1, 2021.3.20f1) (Baker<> not supported)

Reproduced using: macOS 13.0.1 (Intel), Windows 11 (by the reporter)

Note: not reproduced when removing/commenting the first “#if UNITY_EDITOR” and “#endif“ directives

Errors:
1. Assets/TestAuthoring.cs(1,1): error SGICE003: This error indicates a bug in the DOTS source generators. We'd appreciate a bug report (Help -> Report a Bug...). Thanks! Error message: 'System.ArgumentOutOfRangeException: Non-negative number required. (Parameter 'count') |--| at System.Text.StringBuilder.Insert(Int32 index, String value, Int32 count) |--| at Unity.Entities.SourceGen.Common.TypeCreationHelpers.GenerateSourceTextForRootNodes(String generatedSourceFilePath, BaseTypeDeclarationSyntax originalSyntax, String generatedSyntax, CancellationToken cancellationToken) |--| at Unity.Entities.SourceGen.JobEntity.JobEntityGenerator.Execute(SourceProductionContext context, Compilation compilation, StructDeclarationSyntax candidate, String projectPath, Boolean performSafetyChecks, Boolean outputSourceGenFiles)'.
2. Assets/TestAuthoring.cs(36,25): error CS0117: 'TestJob' does not contain a definition for 'InternalCompiler'
3. Assets/TestAuthoring.cs(39,50): error CS0315: The type 'TestJob' cannot be used as type parameter 'T' in the generic type or method 'JobChunkExtensions.ScheduleParallel<T>(T, EntityQuery, JobHandle)'. There is no boxing conversion from 'TestJob' to 'Unity.Entities.IJobChunk'.