```
warning: `crate::task::panic_waker` is both a module and a function
  --> futures-test/src/task/mod.rs:26:23
   |
26 | //! - [`panic_waker`](crate::task::panic_waker) creates a waker that panics when
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^ ambiguous link
   |
   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
help: to link to the module, prefix with `mod@`
   |
26 | //! - [`panic_waker`](mod@crate::task::panic_waker) creates a waker that panics when
   |                       ++++
help: to link to the function, add parentheses
   |
26 | //! - [`panic_waker`](crate::task::panic_waker()) creates a waker that panics when
   |                                               ++
```

* Don't ignore empty state polling

* Test case

* Start polling in a loop to ensure we don't wait for an outdated waker

Closes #2724

```
error: unknown lint: `useless_anonymous_reexport`
 --> futures/tests/no-std/src/lib.rs:3:10
  |
3 | #![allow(useless_anonymous_reexport)]
  |          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `-D unknown-lints` implied by `-D warnings`

error: unused import: `futures_core::task::__internal::AtomicWaker as _`
 --> futures/tests/no-std/src/lib.rs:7:9
  |
7 | pub use futures_core::task::__internal::AtomicWaker as _;
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `-D unused-imports` implied by `-D warnings`

error: unused import: `futures_channel::oneshot as _`
  --> futures/tests/no-std/src/lib.rs:15:9
   |
15 | pub use futures_channel::oneshot as _;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unused import: `futures::task::AtomicWaker as _`
  --> futures/tests/no-std/src/lib.rs:19:9
   |
19 | pub use futures::task::AtomicWaker as _;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unused import: `futures::stream::FuturesOrdered as _`
  --> futures/tests/no-std/src/lib.rs:23:9
   |
23 | pub use futures::stream::FuturesOrdered as _;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unused import: `futures_util::task::AtomicWaker as _`
  --> futures/tests/no-std/src/lib.rs:27:9
   |
27 | pub use futures_util::task::AtomicWaker as _;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unused import: `futures_util::stream::FuturesOrdered as _`
  --> futures/tests/no-std/src/lib.rs:31:9
   |
31 | pub use futures_util::stream::FuturesOrdered as _;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```

syn 2.0 requires 1.56.