invalid operation: c.tracer != nil (mismatched types logging.ConnectionTracer and untyped nil)

invalid operation: c.tracer == nil (mismatched types logging.ConnectionTracer and untyped nil)

cannot use (*wireEndpoint)(tunDevice) (value of type *wireEndpoint) as stack.LinkEndpoint value in argument to ipStack.CreateNIC: *wireEndpoint does not implement stack.LinkEndpoint (missing method ParseHeader)

cannot use (*wireEndpoint)(w) (value of type *wireEndpoint) as stack.LinkEndpoint value in return statement: *wireEndpoint does not implement stack.LinkEndpoint (missing method ParseHeader)

cannot use (*wireEndpoint)(nil) (value of type *wireEndpoint) as stack.LinkEndpoint value in variable declaration: *wireEndpoint does not implement stack.LinkEndpoint (missing method ParseHeader)