File name and line number don't appear in error message

[shibukawa]

When template parameter is used, the file name and line number don't appear in the error message.

$ jsx test.jsx
class should be declared as 'abstract' since the following members do not have concrete definition: Base#method()

abstract class Base {
    abstract function method() : void;
}

class Child.<T> extends Base {
}

class GrandChild extends Child.<int> {
    override function method() : void {}
}