Driver bug feedback / reporting - where to go?

I’m testing out the NVIDIA beta drivers 356.39, and I am seeing null-dereference crashes in nvoglnt64.dll when I try to destroy a NULL VkFence or VkSemaphore (object initialized to VK_NULL_HANDLE). The spec says that NULL parameters should not generate errors, unless I misread it. Where would I submit this feedback?

to the guy that created the driver. In this case find the nvidia bug reporting portal and go there.