Top rust-clippy issues

Incorrect suggestion in "unnecessary-sort-by"

same_item_push being suggested for values that are not Copy or Clone

A-suggestion L-bug L-enhancement good-first-issue

False positive in doc_markdown lint: reference style link to type in external crate

L-documentation good-first-issue hacktoberfest

ICE when running clippy on 'criner'

L-crash

internal compiler error: Switch on discriminant of non-ADT

L-bug L-crash

New lint: `_.as_ptr() as *mut _` is Undefined Behavior

Add {debug_,}assert{,-eq,-ne} to utils/higher.rs

L-enhancement T-macros good-first-issue hacktoberfest

ICE with clippy on nightly

L-bug L-crash

Suggestion for removing `to_string()` to `format!()`

E-medium L-enhancement L-lint good-first-issue hacktoberfest

Warn about immediately applied Deref