[Turbo Pascal] Liste chaînée, saisie Read/ReadLn, erreur d'exécution

haaa une liste chainée :
Code:
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type 
  TValue = char;
 
  PCell = ^TCell;
  TCell = packed record
    Value: TValue;
    Next : PCellule;
  end;
 
  TList = object
    Count : integer;
    First : PCell;
    Last : PCell;
    procedure Init;
    procedure Release;
    procedure Add(const Value: TValue);
   end;
 
procedure TList.Init;
begin
  Count := 0;
  First := nil;
  Last := nil;
end;
 
procedure TList.Release;
var C,N : PCell;
begin
  C := First;
  while C <> nil do
  begin
    N := C^.Next;
    Dispose(C);
    C := N;
  end;
  Count := 0;
  First := nil;
  Last := nil;
end;
 
procedure TList.Add(const Value: TValue);
var L : PCell;
begin
  if count = 0 then
  begin
    new(First)
    First^.Value := Value;
    First^.next := nil;
    Last := First;
  end
  else
  begin
    new(L);
    L^.Value := Value;
    L^.Next  := nil;
    Last^.Next := L;
    Last := L;
  end;
  inc(count);
end;
 
procedure Push(const List: TList);
var V : TValue;
begin
  List.Release;
 
  while not eoln do
  begin
    readln(V);
    List.add(V);
  end;
end;