Attributes without parameters are never constructed when calling `Type.GetCustomAttributes()`

[CoryCharlton]

Target name(s)

No response

Firmware version

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Was working before? On which version?

No response

Device capabilities

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Description

If an attribute has a default constructor (without parameters) it is never executed after calling Type.GetCustomAttributes(). An object of the correct type is returned but it is in an unconstructed state.

How to reproduce

https://github.com/CoryCharlton/NF.AttributeConstructorExample/blob/main/Issue_1584/Program.cs

using System;
using System.Threading;

namespace Issue_1584
{
    public class Program
    {
        public static void Main()
        {
            Console.WriteLine("[1] Program starting");

            var attributes = typeof(ExampleClass).GetCustomAttributes(true);

            Console.WriteLine($"[3] {attributes.Length} attribute retrieved.");
            Console.WriteLine($"[4] Attribute is of type {attributes[0].GetType().Name}");

            Thread.Sleep(Timeout.Infinite);
        }
    }

    public class ExampleAttribute : Attribute
    {
        public ExampleAttribute()
        {
            Console.WriteLine($"[2] {nameof(ExampleAttribute)}.ctor() is never called");
        }
    }

    [Example]
    public class ExampleClass
    {

    }
}

Expected behaviour

The constructor is called.

Screenshots

No response

Aditional information

I took at look at the code and believe the issue exists here:

https://github.com/nanoframework/nf-interpreter/blob/10dfd6198707691d555d922a71abc123a1bceebe/src/CLR/CorLib/corlib_native_System_RuntimeType.cpp#L362

Unfortunately I'm not familiar enough with this code, or the type system in general, to determine where the actual constructor is executed or what is missing.