The race here happened when a port had its deschedule in select() canceled, but
the other chan had already been dropped. This meant that the DISCONNECTED case
was hit in abort_selection, but the to_wake cell hadn't been emptied yet (this
was done after aborting), causing an assert in abort_selection to trip.

To fix this, the to_wake cell is just emptied before abort_selection is called
(we know that we're the owner of it already).

fixes: rust-lang#11775

current state: indiscriminately emits the lint for mod files in tests.

The following

tests/
  common/
    mod.rs
  test.rs

is a common pattern for code shared across the tests and is suggested in
the rust book. The change adds an additional check to verify that the
mod file is not in tests.

changelog: Fix [`mod_module_files`]: false positive for mod files in
tests folder

[`mod_module_files`] Don't emit lint for mod.rs in tests

fixes: rust-lang#11775

current state: indiscriminately emits the lint for mod files in tests.

The following

```
tests/
  common/
    mod.rs
  test.rs
```

is a common pattern for code shared across the tests and is suggested in the rust book. The change adds an additional check to verify that the mod file is not in tests.

changelog: Fix [`mod_module_files`]: false positive for mod files in tests folder