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Changelog Rust 1.48

[Rendered](https://github.com/flip1995/rust-clippy/blob/changelog/CHANGELOG.md)

This changelog is **big**. Hacktoberfest was pretty good for us, even though we had too few reviewers.

changelog: none
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## Unreleased / In Rust Nightly

[e636b88...master](https://github.com/rust-lang/rust-clippy/compare/e636b88...master)
[b20d4c1...master](https://github.com/rust-lang/rust-clippy/compare/b20d4c1...master)

## Rust 1.49

Current beta, release 2020-12-31

[e636b88...b20d4c1](https://github.com/rust-lang/rust-clippy/compare/e636b88...b20d4c1)

### New Lints

* [`field_reassign_with_default`] [#5911](https://github.com/rust-lang/rust-clippy/pull/5911)
* [`await_holding_refcell_ref`] [#6029](https://github.com/rust-lang/rust-clippy/pull/6029)
* [`disallowed_method`] [#6081](https://github.com/rust-lang/rust-clippy/pull/6081)
* [`inline_asm_x86_att_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`inline_asm_x86_intel_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`from_iter_instead_of_collect`] [#6101](https://github.com/rust-lang/rust-clippy/pull/6101)
* [`mut_mutex_lock`] [#6103](https://github.com/rust-lang/rust-clippy/pull/6103)
* [`single_element_loop`] [#6109](https://github.com/rust-lang/rust-clippy/pull/6109)
* [`manual_unwrap_or`] [#6123](https://github.com/rust-lang/rust-clippy/pull/6123)
* [`large_types_passed_by_value`] [#6135](https://github.com/rust-lang/rust-clippy/pull/6135)
* [`result_unit_err`] [#6157](https://github.com/rust-lang/rust-clippy/pull/6157)
* [`ref_option_ref`] [#6165](https://github.com/rust-lang/rust-clippy/pull/6165)
* [`manual_range_contains`] [#6177](https://github.com/rust-lang/rust-clippy/pull/6177)
* [`unusual_byte_groupings`] [#6183](https://github.com/rust-lang/rust-clippy/pull/6183)
* [`comparison_to_empty`] [#6226](https://github.com/rust-lang/rust-clippy/pull/6226)
* [`map_collect_result_unit`] [#6227](https://github.com/rust-lang/rust-clippy/pull/6227)
* [`manual_ok_or`] [#6233](https://github.com/rust-lang/rust-clippy/pull/6233)

### Moves and Deprecations

* Rename `single_char_push_str` to [`single_char_add_str`]
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* Rename `zero_width_space` to [`invisible_characters`]
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* Deprecate [`drop_bounds`] (uplifted)
[#6111](https://github.com/rust-lang/rust-clippy/pull/6111)
* Move [`string_lit_as_bytes`] to `nursery`
[#6117](https://github.com/rust-lang/rust-clippy/pull/6117)
* Move [`rc_buffer`] to `restriction`
[#6128](https://github.com/rust-lang/rust-clippy/pull/6128)

### Enhancements

* [`manual_memcpy`]: Also lint when there are loop counters (and produce a
reliable suggestion)
[#5727](https://github.com/rust-lang/rust-clippy/pull/5727)
* [`single_char_add_str`]: Also lint on `String::insert_str`
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* [`invisible_characters`]: Also lint the characters `\u{AD}` and `\u{2060}`
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* [`eq_op`]: Also lint on the `assert_*!` macro family
[#6167](https://github.com/rust-lang/rust-clippy/pull/6167)
* [`items_after_statements`]: Also lint in local macro expansions
[#6176](https://github.com/rust-lang/rust-clippy/pull/6176)
* [`unnecessary_cast`]: Also lint casts on integer and float literals
[#6187](https://github.com/rust-lang/rust-clippy/pull/6187)
* [`manual_unwrap_or`]: Also lint `Result::unwrap_or`
[#6190](https://github.com/rust-lang/rust-clippy/pull/6190)
* [`match_like_matches_macro`]: Also lint when `match` has more than two arms
[#6216](https://github.com/rust-lang/rust-clippy/pull/6216)
* [`integer_arithmetic`]: Better handle `/` an `%` operators
[#6229](https://github.com/rust-lang/rust-clippy/pull/6229)

### False Positive Fixes

* [`needless_lifetimes`]: Bail out if the function has a `where` clause with the
lifetime [#5978](https://github.com/rust-lang/rust-clippy/pull/5978)
* [`explicit_counter_loop`]: No longer lints, when loop counter is used after it
is incremented [#6076](https://github.com/rust-lang/rust-clippy/pull/6076)
* [`or_fun_call`]: Revert changes addressing the handling of `const fn`
[#6077](https://github.com/rust-lang/rust-clippy/pull/6077)
* [`needless_range_loop`]: No longer lints, when the iterable is used in the
range [#6102](https://github.com/rust-lang/rust-clippy/pull/6102)
* [`inconsistent_digit_grouping`]: Fix bug when using floating point exponent
[#6104](https://github.com/rust-lang/rust-clippy/pull/6104)
* [`mistyped_literal_suffixes`]: No longer lints on the fractional part of a
float (e.g. `713.32_64`)
[#6114](https://github.com/rust-lang/rust-clippy/pull/6114)
* [`invalid_regex`]: No longer lint on unicode characters within `bytes::Regex`
[#6132](https://github.com/rust-lang/rust-clippy/pull/6132)
* [`boxed_local`]: No longer lints on `extern fn` arguments
[#6133](https://github.com/rust-lang/rust-clippy/pull/6133)
* [`needless_lifetimes`]: Fix regression, where lifetime is used in `where`
clause [#6198](https://github.com/rust-lang/rust-clippy/pull/6198)

### Suggestion Fixes/Improvements

* [`unnecessary_sort_by`]: Avoid dereferencing the suggested closure parameter
[#6078](https://github.com/rust-lang/rust-clippy/pull/6078)
* [`needless_arbitrary_self_type`]: Correctly handle expanded code
[#6093](https://github.com/rust-lang/rust-clippy/pull/6093)
* [`useless_format`]: Preserve raw strings in suggestion
[#6151](https://github.com/rust-lang/rust-clippy/pull/6151)
* [`empty_loop`]: Suggest alternatives
[#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`borrowed_box`]: Correctly add parentheses in suggestion
[#6200](https://github.com/rust-lang/rust-clippy/pull/6200)
* [`unused_unit`]: Improve suggestion formatting
[#6247](https://github.com/rust-lang/rust-clippy/pull/6247)

### Documentation Improvements

* Some doc improvements:
* [`rc_buffer`] [#6090](https://github.com/rust-lang/rust-clippy/pull/6090)
* [`empty_loop`] [#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`doc_markdown`]: Document problematic link text style
[#6107](https://github.com/rust-lang/rust-clippy/pull/6107)

## Rust 1.48

Current beta, release 2020-11-19
Current stable, released 2020-11-19

[09bd400...e636b88](https://github.com/rust-lang/rust-clippy/compare/09bd400...e636b88)

Expand Down Expand Up @@ -56,15 +162,15 @@ Current beta, release 2020-11-19

* [`useless_attribute`]: permit allowing [`wildcard_imports`] and [`enum_glob_use`]
[#5994](https://github.com/rust-lang/rust-clippy/pull/5994)
* [`transmute_ptr_to_ptr`]: avoid suggesting dereferencing raw pointers in const contexts
* [`transmute_ptr_to_ptr`]: avoid suggesting dereferencing raw pointers in const contexts
[#5999](https://github.com/rust-lang/rust-clippy/pull/5999)
* [`redundant_closure_call`]: take into account usages of the closure in nested functions and closures
[#5920](https://github.com/rust-lang/rust-clippy/pull/5920)
* Fix false positive in [`borrow_interior_mutable_const`] when referencing a field behind a pointer
[#5949](https://github.com/rust-lang/rust-clippy/pull/5949)
* [`doc_markdown`]: allow using "GraphQL" without backticks
[#5996](https://github.com/rust-lang/rust-clippy/pull/5996)
* [`to_string_in_display`]: avoid linting when calling `to_string()` on anything that is not `self`
* [`to_string_in_display`]: avoid linting when calling `to_string()` on anything that is not `self`
[#5971](https://github.com/rust-lang/rust-clippy/pull/5971)
* [`indexing_slicing`] and [`out_of_bounds_indexing`] treat references to arrays as arrays
[#6034](https://github.com/rust-lang/rust-clippy/pull/6034)
Expand All @@ -85,27 +191,27 @@ Current beta, release 2020-11-19
[#5946](https://github.com/rust-lang/rust-clippy/pull/5946)
* [`useless_conversion`]: show the type in the error message
[#6035](https://github.com/rust-lang/rust-clippy/pull/6035)
* [`unnecessary_mut_passed`]: discriminate between functions and methods in the error message
* [`unnecessary_mut_passed`]: discriminate between functions and methods in the error message
[#5892](https://github.com/rust-lang/rust-clippy/pull/5892)
* [`float_cmp`] and [`float_cmp_const`]: change wording to make margin of error less ambiguous
[#6043](https://github.com/rust-lang/rust-clippy/pull/6043)
* [`default_trait_access`]: do not use unnecessary type parameters in the suggestion
[#5993](https://github.com/rust-lang/rust-clippy/pull/5993)
* [`collapsible_if`]: don't use expanded code in the suggestion
* [`collapsible_if`]: don't use expanded code in the suggestion
[#5992](https://github.com/rust-lang/rust-clippy/pull/5992)
* Do not suggest empty format strings in [`print_with_newline`] and [`write_with_newline`]
[#6042](https://github.com/rust-lang/rust-clippy/pull/6042)
* [`unit_arg`]: improve the readability of the suggestion
[#5931](https://github.com/rust-lang/rust-clippy/pull/5931)
* [`stable_sort_primitive`]: print the type that is being sorted in the lint message
* [`stable_sort_primitive`]: print the type that is being sorted in the lint message
[#5935](https://github.com/rust-lang/rust-clippy/pull/5935)
* Show line count and max lines in [`too_many_lines`] lint message
[#6009](https://github.com/rust-lang/rust-clippy/pull/6009)
* Keep parentheses in the suggestion of [`useless_conversion`] where applicable
[#5900](https://github.com/rust-lang/rust-clippy/pull/5900)
* [`option_map_unit_fn`] and [`result_map_unit_fn`]: print the unit type `()` explicitly
[#6024](https://github.com/rust-lang/rust-clippy/pull/6024)
* [`redundant_allocation`]: suggest replacing `Rc<Box<T>>` with `Rc<T>`
* [`redundant_allocation`]: suggest replacing `Rc<Box<T>>` with `Rc<T>`
[#5899](https://github.com/rust-lang/rust-clippy/pull/5899)
* Make lint messages adhere to rustc dev guide conventions
[#5893](https://github.com/rust-lang/rust-clippy/pull/5893)
Expand All @@ -128,7 +234,7 @@ Current beta, release 2020-11-19

## Rust 1.47

Current stable, released 2020-10-08
Released 2020-10-08

[c2c07fa...09bd400](https://github.com/rust-lang/rust-clippy/compare/c2c07fa...09bd400)

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21 changes: 19 additions & 2 deletions doc/changelog_update.md
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Expand Up @@ -29,8 +29,11 @@ bullet points might be helpful:
* When writing the release notes for the **upcoming beta release**, you need to check
out the Clippy commit of the current Rust `master`. [Link][rust_master_tools]
* When writing the (forgotten) release notes for a **past stable release**, you
need to select the Rust release tag from the dropdown and then check the
commit of the Clippy directory:
need to check out the Rust release tag of the stable release.
[Link][rust_stable_tools]

Usually you want to wirte the changelog of the **upcoming stable release**. Make
sure though, that `beta` was already branched in the Rust repository.

To find the commit hash, issue the following command when in a `rust-lang/rust` checkout:
```
Expand Down Expand Up @@ -71,10 +74,24 @@ The order should roughly be:
7. Documentation improvements
8. Others

As section headers, we use:

```
### New Lints
### Moves and Deprecations
### Enhancements
### False Positive Fixes
### Suggestion Fixes/Improvements
### ICE Fixes
### Documentation Improvements
### Others
```

Please also be sure to update the Beta/Unreleased sections at the top with the
relevant commit ranges.

[changelog]: https://github.com/rust-lang/rust-clippy/blob/master/CHANGELOG.md
[forge]: https://forge.rust-lang.org/
[rust_master_tools]: https://github.com/rust-lang/rust/tree/master/src/tools/clippy
[rust_beta_tools]: https://github.com/rust-lang/rust/tree/beta/src/tools/clippy
[rust_stable_tools]: https://github.com/rust-lang/rust/releases

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