[dcc32致命错误]：F2084内部错误: NC1921

Question

我试图在Delphi中编译以下代码：

unit untObjectHelper;

interface

uses
   SysUtils;

type
   TObjectHelper = class(TInterfacedObject)
   public
      class procedure Clone(const objOrigem: TObject; const objDestino: TObject);
   end;

implementation

uses
   System.Rtti;

{ TObjectHelper }

class procedure TObjectHelper.Clone(const objOrigem,
   objDestino: TObject);
begin
   if not Assigned(objOrigem) then
      Exit;

   if not Assigned(objDestino) then
      Exit;

   if objOrigem.ClassType <> objDestino.ClassType then
      Exit;

   var contexto := TRttiContext.Create;
   try
      var tipo := contexto.GetType(objOrigem.ClassType);
      var campos := tipo.GetFields();
   finally
      contexto.Free;
   end;
end;

end.

然而，发生以下错误：

dcc32致命错误untObjectHelper.pas (36)：F2084内部错误: NC1921

在线路上：

var fields: = type.GetFields ();

版本:Embarcadero Delphi 10.3版本26.0.33219.4899

我没有找到这个错误的参考，有人能帮我吗？非常感谢

Answer 1

问题在于类型推断，这要感谢鲁迪·维尔萨斯的提示。

unit untObjectHelper;

interface

uses
   SysUtils;

type
   TObjectHelper = class(TInterfacedObject)
   public
      class procedure Clone(const objOrigem: TObject; const objDestino: TObject);
   end;

implementation

uses
   System.Rtti;

{ TObjectHelper }

class procedure TObjectHelper.Clone(const objOrigem,
   objDestino: TObject);
begin
   if not Assigned(objOrigem) then
      Exit;

   if not Assigned(objDestino) then
      Exit;

   if objOrigem.ClassType <> objDestino.ClassType then
      Exit;

   var contexto := TRttiContext.Create;
   try
      var tipo := contexto.GetType(objOrigem.ClassType);
      var campos: TArray<TRttiField> := tipo.GetFields();
   finally
      contexto.Free;
   end;
end;

end.