human
Solve the following python programming problem given the following code:
def test_mutabledisposable_replaceafterdispose() : 
    disp1 = [False] 
    disp2 = [False] 
    m = SerialDisposable () 
    m.dispose () 
    def action1() : 
        disp1 [0] = True 
d1 = Disposable (action1) 
    m.disposable = d1 
    assert (m.disposable == None) 
    assert disp1 [0] 
    def action2() : 
        disp2 [0] = True 
d2 = Disposable (action1) 
    m.disposable = d2 
    assert (m.disposable == None) 
    assert disp2 [0] 

    
    

    Fix the buggy line: d2 = Disposable (action1)
assistant
#Here is Python program to fix the buggy line: d2 = Disposable (action1)
.

d2 = Disposable (def action2()