Version Used: 17.2-Preview1

Steps to Reproduce:

1. Create a Blazor project
2. Open Index.Razor
3. Replace its content with

@using System.Text.RegularExpressions

@code {
    [RegexGenerator("[0-9]")] private static partial Regex someRegex();
}

4. Build the project

Expected Behavior:
No compile error

Actual Behavior:
Compile error:

Additional Notes:
I'm assuming this is due to SourceGenerators not being able to reliable consume outputs from other SourceGenerators