Rustup (#16791)

r? @ghost

changelog: none

Fix `explicit_counter_loop` FN when loop counter starts at non-zero (#…

…16620)

Closes #16612

Previous implementation hardcoded `0` as loop counter start, this PR
lifts that restriction.

changelog: [`explicit_counter_loop`] fix FN when loop counter starts at
non-zero

Fix `unnecessary_to_owned` wrongly unmangled macros (#16354)

Closes #16351

changelog: [`unnecessary_to_owned`] fix wrongly unmangled macros

Rustup (#16153)

r? @ghost

changelog: none

Rustup (#15892)

r? @ghost

changelog: none

Rustup (#15616)

r? @ghost

changelog: integer-to-pointer-transmutes are now handled by the upstream
`integer_to_ptr_transmutes` Rust lint and no longer by the
[`useless_transmute`] Clippy lint

Rustup (#15341)

r? @ghost

changelog: none

Rustup (#15044)

r? @ghost

changelog: none

Rustup (#14721)

r? @ghost

changelog: none

fix: `missing_const_for_fn` FP on unstable const traits (#14294)

Closes #14020
Closes #14290
Closes #14091

Add checks for unstable const traits.

changelog: [`missing_const_for_fn`] fix FP on unstable const traits