human
Solve the following python programming problem given the following code:
@ pytest.mark.skipif ((greenlet is None), reason = 'greenlet not installed') 
def test_greenlet_context_copying_api() : 
    app = flask.Flask (__name__) 
    greenlets = [] 
    @ app.route ('/') 
    def index() : 
        reqctx = flask._request_ctx_stack.top.copy () 
        @ flask.copy_current_request_context 
        def g() : 
            assert flask.request 
            assert (flask.current_app == app) 
            assert (flask.request.path == '/') 
            assert (flask.request.args ['foo'] == 'bar') 
            return 42 
greenlets.append (greenlet (g)) 
        return 'Hello World!' 
rv = app.test_client ().get ('/?foo=bar') 
    assert (result.data == b'Hello World!') 
    result = greenlets [0].run () 
    assert (result == 42) 

    
    

    Fix the buggy line: assert (result.data == b'Hello World!')
assistant
#Here is Python code to fix the buggy line: assert (result.

assert (rv.data == b'Hello World!')