tostring does not accept wstring

[Phlarx]

The following code will produce an error:

void Main() {
  print(tostring(wstring("hello")));
}

Error:

[   ScriptRuntime] [05:19:22]  Script exception: Unable to return string representation of value with type wstring
[   ScriptRuntime] [05:19:22]    C:/Users/<user>/OpenplanetNext/Scripts/Plugin__ToStr.as (line 2, column 3)
[   ScriptRuntime] [05:19:22]      #0  void Main() (C:/Users/<user>/OpenplanetNext/Scripts/Plugin__ToStr.as line 2)

Tested both Next and MP4