[Bug]: Lambdas with in parameters throws error

[harry-dickson]

Description

There is an error with lambdas with in parameters. Using v2.2.0 in VS 2026
Formatting this code fails:

public delegate void MessageTemplateFormatter(in MessageTemplate template, in LogInfo info);

public class Problem
{
    public static void SetPrefixFormatter(MessageTemplateFormatter formatter) { }

    public static Problem()
    {
        SetPrefixFormatter((in template, in info) => { });
    }
}

[Debug - 19/01/2026 10:37:54] File is ignored by .csharpierignore or there was an error

Formats successfully with

    public static Problem()
    {
        SetPrefixFormatter((template, info) => { });
    }

Steps to Reproduce

Try to format code in description

Expected Behavior

No error

Actual Behavior

Formatting failure

[belav]

That code formats correctly on https://playground.csharpier.com/

2.2.0 is the extension version. You are most likely using an outdated version of csharpier itself, the current version of that is 1.2.5.

[harry-dickson]

Ah yes, of course. It's been too long since I set it up...

dotnet tool install csharpier -g

fixed it