"Field needed by Interface is missing" has unknown position when defining from Context.defineType and then using Context.typeof

[Speedphoenix]

Try haxe: https://try.haxe.org/#15BeB54A

  var pos = Context.currentPos();

  var tfields = (macro class {
    public var bit:Int;
  }).fields;

  var t:TypeDefinition = {
    pos: pos,
    pack: [],
    meta: [{name: ":structInit", pos: pos}],
    name: "TestType",
    kind: TDClass([{pack: [], name: "Test", sub: "TestInterface"},]),
    fields: tfields,
  };
  Context.defineType(t);
  var complex:ComplexType = TPath({pack: [], name: "Macro", sub: "TestType"});

  var type = Context.typeof(macro(null : $complex));

this yields

[ERROR] (unknown position)

   | Field bit2 needed by TestInterface is missing