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There is a newer version: 1.12.1

Why is this an issue?

  Local variables must be initialized before use to ensure the code behaves deterministically and
  in an error-free manner.


  Unlike object fields and global variables, contents of local variables are generally undefined
  until initialized. The only exceptions are the following managed types:


  Strings
  Variants
  Interfaces
  Arrays of the above types

How to fix it
Assign the variable with an initial value before using it.
procedure GetCount(MyList: TList);
var
  ListSize: Integer;
begin
  if (MyList.Count > 0) then begin
    ListSize := MyList.Count;
  end;

  Writeln(Format('The list has %d elements', [ListSize]));
end;

procedure GetCount(MyList: TList);
var
  ListSize: Integer;
begin
  ListSize := 0;
  if (MyList.Count > 0) then begin
    ListSize := MyList.Count;
  end;

  Writeln(Format('The list has %d elements', [ListSize]));
end;

Resources

  
    
      Stack Overflow: Are delphi variables initialized with a value by default?
    
  
  
    
      RAD Studio documentation: Variables (Delphi)