Update CHANGELOG for v1.9.0 release by ytmimi · Pull Request #6811 · rust-lang/rustfmt

ytmimi · 2026-02-25T06:02:20Z

Looking at all the PRs with the release-notes label, these seemed to me like all the outstanding entries that needed to be mentioned.

r? @jieyouxu

jieyouxu

Looks good overall, just some pedantism. For the linking-to-issue/PR questions, maybe we link both the original report and the fix/impl PR, but that might be a lot of work, so maybe just link the fix PR?

@rustbot author

View changes since this review

jieyouxu · 2026-02-25T12:31:06Z

CHANGELOG.md

+- Add new nightly-only `float_literal_trailing_zero` option [#3187](https://github.com/rust-lang/rustfmt/issues/3187)
+  - See the [`float_literal_trailing_zero` configuration documentation](https://rust-lang.github.io/rustfmt/?version=v1.9.0&search=#float_literal_trailing_zero) for more details


Question: should these point to the original feature request issue and/or the impl? In this particular case we point to the issue, the impl is #5834

CHANGELOG.md

jieyouxu · 2026-02-25T12:47:30Z

CHANGELOG.md

 - Correct version chunk splitting in the internal version sort algorithm [#6407](https://github.com/rust-lang/rustfmt/pull/6407)
 - Extend support for single line let-chain formatting to include cases where the left hand side operand is a literal, in alignment with finalized style rules as part of let-chain stabilization [#6492](https://github.com/rust-lang/rustfmt/pull/6492)
 - Begin initial formatting for `use closures` and `use chains` (`#![feature(ergonomic_clones)]`). Previously, the closure and chain was left as the developer wrote it [#6532](https://github.com/rust-lang/rustfmt/pull/6532)
+- The unstable `required_version` configuration option now support semantic versioning [#6063](https://github.com/rust-lang/rustfmt/issues/6063)


Question: should this link to the impl PR #6066 instead?

jieyouxu · 2026-02-25T12:52:27Z

CHANGELOG.md

 - Fix panic when sorting imports [#6333](https://github.com/rust-lang/rustfmt/issues/6333)
 - Fix issue with `wrap_comments` invalidating code blocks [#6417](https://github.com/rust-lang/rustfmt/pull/6417)
 - No longer remove closure block label within a macro call [#6465](https://github.com/rust-lang/rustfmt/issues/6465)
+- Fix idempotency issue when normalizing imports [#6558](https://github.com/rust-lang/rustfmt/issues/6558)


Question: should this link to the fix PR #6573?

jieyouxu · 2026-02-25T12:53:16Z

CHANGELOG.md

 - Fix issue with `wrap_comments` invalidating code blocks [#6417](https://github.com/rust-lang/rustfmt/pull/6417)
 - No longer remove closure block label within a macro call [#6465](https://github.com/rust-lang/rustfmt/issues/6465)
 - Fix idempotency issue when normalizing imports [#6558](https://github.com/rust-lang/rustfmt/issues/6558)
+- Properly split long pattern in `if-let` at the `max_width` when setting `style_edition=2027` [#6202](https://github.com/rust-lang/rustfmt/issues/6202)


Question: maybe the impl PR #6572?

jieyouxu · 2026-02-25T12:55:27Z

CHANGELOG.md

 - Extend support for single line let-chain formatting to include cases where the left hand side operand is a literal, in alignment with finalized style rules as part of let-chain stabilization [#6492](https://github.com/rust-lang/rustfmt/pull/6492)
 - Begin initial formatting for `use closures` and `use chains` (`#![feature(ergonomic_clones)]`). Previously, the closure and chain was left as the developer wrote it [#6532](https://github.com/rust-lang/rustfmt/pull/6532)
 - The unstable `required_version` configuration option now support semantic versioning [#6063](https://github.com/rust-lang/rustfmt/issues/6063)
+- Format `lazy_static::lazy_static!` like `lazy_static!` when setting `style_edition=2027` [#6287](https://github.com/rust-lang/rustfmt/issues/6287)


Question: maybe #6690?

jieyouxu · 2026-02-25T12:56:03Z

CHANGELOG.md

 - No longer remove closure block label within a macro call [#6465](https://github.com/rust-lang/rustfmt/issues/6465)
 - Fix idempotency issue when normalizing imports [#6558](https://github.com/rust-lang/rustfmt/issues/6558)
 - Properly split long pattern in `if-let` at the `max_width` when setting `style_edition=2027` [#6202](https://github.com/rust-lang/rustfmt/issues/6202)
+- Prevent panic when rewriting missing spans that contain unicode whitespace chars [#5739](https://github.com/rust-lang/rustfmt/issues/5739)


Question: maybe fix PR #5741?

jieyouxu · 2026-02-25T12:57:52Z

CHANGELOG.md

 - Properly split long pattern in `if-let` at the `max_width` when setting `style_edition=2027` [#6202](https://github.com/rust-lang/rustfmt/issues/6202)
 - Prevent panic when rewriting missing spans that contain unicode whitespace chars [#5739](https://github.com/rust-lang/rustfmt/issues/5739)
 - Allow `NotADirectory` errors when looking up rustfmt configuration files [#6624](https://github.com/rust-lang/rustfmt/pull/6624)
+- Prevent panic when sorting imports starting with a `_` for `style_edition=2015|2018|2021` [#6668](https://github.com/rust-lang/rustfmt/issues/6668)


Question: maybe fix PR #6786?

jieyouxu · 2026-02-25T13:02:45Z

CHANGELOG.md

 - Prevent panic when rewriting missing spans that contain unicode whitespace chars [#5739](https://github.com/rust-lang/rustfmt/issues/5739)
 - Allow `NotADirectory` errors when looking up rustfmt configuration files [#6624](https://github.com/rust-lang/rustfmt/pull/6624)
 - Prevent panic when sorting imports starting with a `_` for `style_edition=2015|2018|2021` [#6668](https://github.com/rust-lang/rustfmt/issues/6668)
+- Properly wrap long `impl trait` function parameters at the `max_width` when setting `style_edition=2027` [#6381](https://github.com/rust-lang/rustfmt/issues/6381)


Question: maybe fix PR #6798?

jieyouxu · 2026-02-25T13:04:13Z

CHANGELOG.md

 - Begin initial formatting for `use closures` and `use chains` (`#![feature(ergonomic_clones)]`). Previously, the closure and chain was left as the developer wrote it [#6532](https://github.com/rust-lang/rustfmt/pull/6532)
 - The unstable `required_version` configuration option now support semantic versioning [#6063](https://github.com/rust-lang/rustfmt/issues/6063)
 - Format `lazy_static::lazy_static!` like `lazy_static!` when setting `style_edition=2027` [#6287](https://github.com/rust-lang/rustfmt/issues/6287)
+- Top-level imports are no longer merged when setting `imports_granularity=Module`. Note that `imports_granularity=Module` is still an unstable configuration [#6191](https://github.com/rust-lang/rustfmt/issues/6191)


Question: maybe fix PR #6784?

CHANGELOG.md

rustbot · 2026-02-25T13:15:36Z

Reminder, once the PR becomes ready for a review, use @rustbot ready.

…chars in missing spans

…ition=2015|2018|2021

…rameters

…loop expression

…ularity=Module`

ytmimi · 2026-02-25T22:21:49Z

@jieyouxu thanks for pointing out that I missed documenting those two changes. From what I can tell by looking at the CHANGELOG is that we've linked to both issues and PRs for a long time. I've linked to issues when there was one associated with a PR, and If there wasn't then I linked to the PR. For now I'd rather just continue linking to the issue in those cases that you pointed out.

jieyouxu

Thanks, the current set of changelogs looks good to me

View changes since this review

ytmimi · 2026-02-26T14:36:01Z

Thanks again for your review. I've been thinking on it, and in the future it might make more sense to link to PRs like you suggested.

jieyouxu · 2026-02-26T14:40:06Z

Thanks again for your review. I've been thinking on it, and in the future it might make more sense to link to PRs like you suggested.

Yeah not really a big deal. Cuz reporting the issue in the first place are contributions just like the fix/impl PRs.

chore: Add CHANGELOG details for float_literal_trailing_zero

e68bb15

rustbot added the S-waiting-on-review Status: awaiting review from the assignee but also interested parties. label Feb 25, 2026

rustbot assigned jieyouxu Feb 25, 2026

jieyouxu reviewed Feb 25, 2026

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CHANGELOG.md Show resolved Hide resolved

rustbot added S-waiting-on-author Status: awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: awaiting review from the assignee but also interested parties. labels Feb 25, 2026

ytmimi added 15 commits February 25, 2026 17:11

chore: add CHANGELOG details for required_version semver support

e94a680

chore: Update CHANGELOG entry for match_arm_indent

297ebf1

chore: add CHANGELOG entry for idempotent import fix

4dc1028

chore: add CHANGELOG entry for proper wrapping of long if-let pattern

151dce4

chore: add changelog entry for lazy_static::lazy_static! formatting

7b6e253

chore: add CHANGELOG entry for properly handleing unicode whitespace …

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…chars in missing spans

chore: add CHANGELOG entry for Allow NotADirectory errors

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chore: add changelog entry for transitive import sorting for style_ed…

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…ition=2015|2018|2021

chore: add CHANGELOG entry for Properly wrapping long impl trait pa…

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…rameters

chore: add CHANGELOG entry for imports_granularity=Module changes

af20b60

chore: add CHANGELOG entry for misc dependency upgrades

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chore: add CHANGELOG entry for temporary removal of generic-simd support

b8b9cc9

chore: update date when I think rustfmt v1.9.0 will get synced

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chore: add CHANGELOG entry for trailing_semicolon changes for last …

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…loop expression

chore: add CHANGELOG entry for deduplicate imports when `imports_gran…

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…ularity=Module`

ytmimi force-pushed the update_changelog branch from 315a622 to 24e6691 Compare February 25, 2026 22:15

jieyouxu approved these changes Feb 26, 2026

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ytmimi merged commit 65a91e6 into rust-lang:main Feb 26, 2026
26 checks passed

rustbot added release-notes Needs an associated changelog entry and removed S-waiting-on-author Status: awaiting some action (such as code changes or more information) from the author. labels Feb 26, 2026

ytmimi deleted the update_changelog branch February 26, 2026 14:37

ytmimi removed the release-notes Needs an associated changelog entry label Feb 26, 2026

		- Add new nightly-only `float_literal_trailing_zero` option [#3187](https://github.com/rust-lang/rustfmt/issues/3187)
		- See the [`float_literal_trailing_zero` configuration documentation](https://rust-lang.github.io/rustfmt/?version=v1.9.0&search=#float_literal_trailing_zero) for more details

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