IQueryable<T> extension method crash Roselyn code generation

[Velka-DEV]

Please do the checklist before filing an issue:

• I have read the documentation, including the FAQ
• I can reproduce the bug using the latest prerelease version
• I have searched existing discussion and issue to avoid duplicates

Describe the bug

Using any IQueryable extension method in mapper actually crash the roselyn generation process making unable to generate any code behind.

Declaration code example

public static partial IQueryable<CategoryDto> ProjectToDto(this IQueryable<Category> source);

Environment (please complete the following information):

• Mapperly Version: 4.1.1
• Nullable reference types: [e.g. enabled]
• .NET Version: 8
• Target Framework: net8
• Compiler Version:4.11.0-3.24510.3 (cfe3bd0a)
• C# Language Version: 12
• IDE: Rider 2024.3
• OS: macos 15.2

[latonz]

I cannot reproduce this, could you create a minimal reproducible project on github?

[Velka-DEV]

I cannot reproduce this, could you create a minimal reproducible project on github?

I tried but I can't reproduce it in another repository. It seems it's related to something in our application. Do you know where I can grab the Roselyn logs ?

[latonz]

Are there any diagnostics you can see? Does the build work on the CLI? If this doesn't help you could debug your codebase with DebugRoslynComponent (see also docs). This works for me:

[Mapper]
public static partial class Mapper
{
    public static partial IQueryable<Target> Map(IQueryable<Source> sources);

    [MapValue(nameof(Target.NotInSource), null)]
    [MapperIgnoreSource(nameof(Source.NotInTarget))]
    private static partial Target Map(Source source);
}