human
Solve the following python programming problem given the following code:
def check_maxiter(solver, case) : 
    A = case.A 
    tol = 1e-12 
    b = arange (A.shape [0], dtype = float) 
    x0 = (0 * b) 
    residuals = [] 
    def callback(x) : 
        residuals.append (norm ((b - (case.A * x)))) 
(x, info) = solver (A, b, x0 = x0, tol = tol, maxiter = 3, callback = callback) 
    assert_equal (len (x), 3) 
    assert_equal (info, 3) 

    
    

    Fix the buggy line: assert_equal (len (x), 3)
assistant
#Here is Python program to fix the buggy line: assert_equal (len (x), 3)
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assert_equal (len (residuals), 3)