Weird error with generic TList

[pyscripter 629]

The following console app works fine:

{$APPTYPE CONSOLE}
{$R *.res}

uses
  System.SysUtils,
  System.Classes,
  System.Generics.Collections;

type
  TMethodList = TList<TMethod>;

const Method: TMethod = (Code:nil; Data:nil);

begin
  try
    var fKeyDownChain := TMethodList.Create;
    try
      fKeyDownChain.Add(Method);
      fKeyDownChain.Remove(Method);
      WriteLn(fKeyDownChain.Count);
    finally
      fKeyDownChain.Free;
    end;
  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
  ReadLn;
end.

 

However the exact same sequence results in an access violation when used in a larger Win64 application.

const Method: TMethod = (Code:nil; Data:nil);
begin
  fKeyDownChain := TMethodList.Create;
  fKeyDownChain.Add(Method);
  fKeyDownChain.Remove(Method);

 

The error occurs when you call Remove,  at the first statement of the following function of System.Generics.Defaults,

class function TComparer<T>.EQOperCompare(Self: Pointer; const Left, Right: T): Integer;
begin
  if TRecEqualityOperator<T>(_GetExtInstanceData(Self, 0))(Left, Right) then
    Result := 0
  else
    Result := BinaryCompare(@Left, @Right, SizeOf(T));
end;

In the console application this statement results in a call to TMethod.Equal,   Any clues as to why the error occurs?  

 

Update:  This is a consequence of [RSP-43423] Using {$WEAKLINKRTTI ON} causes access violation on TList<T>.IndexOf method - Embarcadero Technologies.  The console application also fails with {$WEAKLINKRTTI ON}.

I guess specifying a Comparer would be a workaround.  Is there any other workaround apart from removing the WEAKLINKRTTI directive, which increases the size of the executable by 2Mb?  

.

Beyond the executable size, this is quite a serious issue, because it makes the use of generic collections of records in components unsafe, since a user of such a component setting WEAKLINKRTTI to ON, could face unpredictable and hard to detect crashes. 

 

Edited June 13 by pyscripter

[pyscripter 629]

Delphi 12.2 fixed this.