Incorrect type reference

[fvaillancourt]

Describe the bug
Incorrect type reference returned for certain class (record) structure.

Steps To Reproduce

1. Create a new ASP.net project with top level statements (.Net 9)
2. Add Microsoft.AspNetCore.OpenApi 9.0
3. Replace the code with:

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddOpenApi();

var app = builder.Build();
app.MapOpenApi();
app.MapPost("/", (TypeA _) => "Hello World");
app.Run();

public record TypeC(string Id);
public record TypeB(TypeC C);
public record TypeD(TypeB B);
public record TypeA(TypeB B, TypeD D);

Observed behavior
Here is a portion of the file with the offending content. Look at the $ref type.

      "TypeB2": {
        "required": [
          "c"
        ],
        "type": "object",
        "properties": {
          "c": {
            "$ref": "#/components/schemas/#/properties/b/properties/c"
          }
        }
      }

Expected behavior
Not sure yet why we get a TypeB (not shown) and TypeB2, maybe cause here by the bug as it has different type (ref). I would expect the $ref value to be "#/components/schemas/TypeC" and not "#/components/schemas/#/properties/b/properties/c". I am not an OpenApi expert but it does not look like a valid type reference and it fails to parse in all tools I tried.

[max-skimmer]

Another case of this issue:

public record TypeC(string Id);
public record TypeB(List<TypeC> C);
public record TypeD(List<TypeC> C);
public record TypeA(TypeB B, TypeD D);

Observed behavior
There is no duplicates (like TypeB and TypeB2)
But TypeD now looks as

    "TypeD": {
        "required": [
            "c"
        ],
        "type": "object",
        "properties": {
            "c": {
                "type": "array",
                "items": {
                    "$ref": "#/components/schemas/#/properties/b/properties/c/items"
                }
            }
        }
    }

Expected behavior
The $ref value to be "#/components/schemas/TypeC"

[MaggieKimani1]

Closing this issue as it seems to be a duplicate of #2254