human
Solve the following python programming problem given the following code:
def _check_reentrancy(solver, is_reentrant) : 
    def matvec(x) : 
        A = np.array ([[1.0, 0, 0], [0, 2.0, 0], [0, 0, 3.0]]) 
        (y, info) = solver (A, x) 
        assert_equal (info, 0) 
        return y 
b = np.array ([1, (1.0 / 2), (1.0 / 3)]) 
    op = LinearOperator ((3, 3), matvec = matvec, rmatvec = matvec, dtype = b.dtype) 
    if (not is_reentrant) : 
        assert_raises (RuntimeError, solver, y, b) 
else : 
        (y, info) = solver (op, b) 
        assert_equal (info, 0) 
        assert_allclose (y, [1, 1, 1]) 

    
    

    Fix the buggy line: assert_raises (RuntimeError, solver, y, b)
assistant
#Here is Python code to fix the buggy line: assert_raises (RuntimeError, solver, y, b)
.

assert_raises (RuntimeError, solver, op, b)