error[E0277]: the trait bound `lpc8xx_hal::pins::Pin<PIO0_0, Swm<((),), (((),),)>>: AssignFunction<U1_TXD, lpc8xx_hal::swm::Output>` is not satisfied
   --> tests/compile-fail/swm/assign-multiple-output-functions.rs:41:23
    |
41  |         u1_txd.assign(pio0_0, &mut swm_handle);
    |                ------ ^^^^^^ the trait `AssignFunction<U1_TXD, lpc8xx_hal::swm::Output>` is not implemented for `lpc8xx_hal::pins::Pin<PIO0_0, Swm<((),), (((),),)>>`
    |                |
    |                required by a bound introduced by this call
    |
    = help: the following other types implement trait `AssignFunction<Function, Kind>`:
              <lpc8xx_hal::pins::Pin<T, Swm<(), ()>> as AssignFunction<F, lpc8xx_hal::swm::Analog>>
              <lpc8xx_hal::pins::Pin<T, Swm<(), Is>> as AssignFunction<F, lpc8xx_hal::swm::Output>>
              <lpc8xx_hal::pins::Pin<T, Swm<O, Is>> as AssignFunction<F, lpc8xx_hal::swm::Input>>
note: required by a bound in `Function::<T, Unassigned>::assign`
   --> src/swm/functions.rs
    |
    |         Pin<P, S>: AssignFunction<T, T::Kind>,
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Function::<T, Unassigned>::assign`