error[E0277]: `*const ()` cannot be sent between threads safely
  --> ui/not-send.rs:19:15
   |
19 |     is_send::<Consumer<NotSend, 4>>();
   |               ^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `PhantomData<*const ()>`, the trait `Send` is not implemented for `*const ()`
note: required because it appears within the type `PhantomData<*const ()>`
  --> $RUST/core/src/marker.rs
   |
   | pub struct PhantomData<T: ?Sized>;
   |            ^^^^^^^^^^^
   = note: required for `Consumer<'_, PhantomData<*const ()>, 4>` to implement `Send`
note: required by a bound in `is_send`
  --> ui/not-send.rs:14:8
   |
12 | fn is_send<T>()
   |    ------- required by a bound in this function
13 | where
14 |     T: Send,
   |        ^^^^ required by this bound in `is_send`

error[E0277]: `*const ()` cannot be sent between threads safely
  --> ui/not-send.rs:20:15
   |
20 |     is_send::<Producer<NotSend, 4>>();
   |               ^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `PhantomData<*const ()>`, the trait `Send` is not implemented for `*const ()`
note: required because it appears within the type `PhantomData<*const ()>`
  --> $RUST/core/src/marker.rs
   |
   | pub struct PhantomData<T: ?Sized>;
   |            ^^^^^^^^^^^
   = note: required for `Producer<'_, PhantomData<*const ()>, 4>` to implement `Send`
note: required by a bound in `is_send`
  --> ui/not-send.rs:14:8
   |
12 | fn is_send<T>()
   |    ------- required by a bound in this function
13 | where
14 |     T: Send,
   |        ^^^^ required by this bound in `is_send`

error[E0277]: `*const ()` cannot be sent between threads safely
  --> ui/not-send.rs:21:15
   |
21 |     is_send::<Queue<NotSend, 4>>();
   |               ^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `Queue<PhantomData<*const ()>, 4>`, the trait `Send` is not implemented for `*const ()`
note: required because it appears within the type `PhantomData<*const ()>`
  --> $RUST/core/src/marker.rs
   |
   | pub struct PhantomData<T: ?Sized>;
   |            ^^^^^^^^^^^
note: required because it appears within the type `ManuallyDrop<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/manually_drop.rs
   |
   | pub struct ManuallyDrop<T: ?Sized> {
   |            ^^^^^^^^^^^^
note: required because it appears within the type `MaybeUninit<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/maybe_uninit.rs
   |
   | pub union MaybeUninit<T> {
   |           ^^^^^^^^^^^
note: required because it appears within the type `UnsafeCell<MaybeUninit<PhantomData<*const ()>>>`
  --> $RUST/core/src/cell.rs
   |
   | pub struct UnsafeCell<T: ?Sized> {
   |            ^^^^^^^^^^
   = note: required because it appears within the type `[UnsafeCell<MaybeUninit<PhantomData<*const ()>>>; 4]`
note: required because it appears within the type `Queue<PhantomData<*const ()>, 4>`
  --> $HEAPLESS/src/spsc.rs
   |
   | pub struct Queue<T, const N: usize> {
   |            ^^^^^
note: required by a bound in `is_send`
  --> ui/not-send.rs:14:8
   |
12 | fn is_send<T>()
   |    ------- required by a bound in this function
13 | where
14 |     T: Send,
   |        ^^^^ required by this bound in `is_send`

error[E0277]: `*const ()` cannot be sent between threads safely
  --> ui/not-send.rs:22:15
   |
22 |     is_send::<Vec<NotSend, 4>>();
   |               ^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `heapless::vec::VecInner<[MaybeUninit<PhantomData<*const ()>>; 4]>`, the trait `Send` is not implemented for `*const ()`
note: required because it appears within the type `PhantomData<*const ()>`
  --> $RUST/core/src/marker.rs
   |
   | pub struct PhantomData<T: ?Sized>;
   |            ^^^^^^^^^^^
note: required because it appears within the type `ManuallyDrop<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/manually_drop.rs
   |
   | pub struct ManuallyDrop<T: ?Sized> {
   |            ^^^^^^^^^^^^
note: required because it appears within the type `MaybeUninit<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/maybe_uninit.rs
   |
   | pub union MaybeUninit<T> {
   |           ^^^^^^^^^^^
   = note: required because it appears within the type `[MaybeUninit<PhantomData<*const ()>>; 4]`
note: required because it appears within the type `heapless::vec::VecInner<[MaybeUninit<PhantomData<*const ()>>; 4]>`
  --> $HEAPLESS/src/vec.rs
   |
   | pub struct VecInner<B: ?Sized + VecDrop> {
   |            ^^^^^^^^
note: required by a bound in `is_send`
  --> ui/not-send.rs:14:8
   |
12 | fn is_send<T>()
   |    ------- required by a bound in this function
13 | where
14 |     T: Send,
   |        ^^^^ required by this bound in `is_send`

error[E0277]: `*const ()` cannot be sent between threads safely
  --> ui/not-send.rs:23:15
   |
23 |     is_send::<HistoryBuffer<NotSend, 4>>();
   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `HistoryBuffer<PhantomData<*const ()>, 4>`, the trait `Send` is not implemented for `*const ()`
note: required because it appears within the type `PhantomData<*const ()>`
  --> $RUST/core/src/marker.rs
   |
   | pub struct PhantomData<T: ?Sized>;
   |            ^^^^^^^^^^^
note: required because it appears within the type `ManuallyDrop<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/manually_drop.rs
   |
   | pub struct ManuallyDrop<T: ?Sized> {
   |            ^^^^^^^^^^^^
note: required because it appears within the type `MaybeUninit<PhantomData<*const ()>>`
  --> $RUST/core/src/mem/maybe_uninit.rs
   |
   | pub union MaybeUninit<T> {
   |           ^^^^^^^^^^^
   = note: required because it appears within the type `[MaybeUninit<PhantomData<*const ()>>; 4]`
note: required because it appears within the type `HistoryBuffer<PhantomData<*const ()>, 4>`
  --> $HEAPLESS/src/histbuf.rs
   |
   | pub struct HistoryBuffer<T, const N: usize> {
   |            ^^^^^^^^^^^^^
note: required by a bound in `is_send`
  --> ui/not-send.rs:14:8
   |
12 | fn is_send<T>()
   |    ------- required by a bound in this function
13 | where
14 |     T: Send,
   |        ^^^^ required by this bound in `is_send`