Maple says that $\frac{\partial}{\partial x} (xy) = 0$?

Question

For some reason maple claims that $\frac{\partial}{\partial x} (xy) = 0$ as seen below

But I am very sure that $\frac{\partial}{\partial x} (xy) = 0$ is wrong and should be $\frac{\partial}{\partial x} (xy) = y$? So what is going on?

Answer 1

I dont work with Maple, but I suspect that you should type diff(x*y,x) instead of diff(xy,x).