[`refurb`] Fix `FURB101` and `FURB103` false positives when I/O variable is used later by chirizxc · Pull Request #23542 · astral-sh/ruff

chirizxc · 2026-02-24T17:07:19Z

Summary

Test Plan

cargo nextest run furb

astral-sh-bot · 2026-02-24T17:16:47Z

`ruff-ecosystem` results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+5 -6 violations, +0 -0 fixes in 4 projects; 52 projects unchanged)

apache/superset (+1 -1 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --no-fix --output-format concise --preview --select ALL

+ superset/db_engine_specs/lint_metadata.py:676:18: FURB103 [*] `open` and `write` should be replaced by `Path(args.output).write_text(output_text)`
- superset/db_engine_specs/lint_metadata.py:676:18: FURB103 [*] `open` and `write` should be replaced by `Path(args.output).write_text(output_text)`

ibis-project/ibis (+1 -1 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --no-fix --output-format concise --preview

+ .github/workflows/algolia/upload-algolia-api.py:165:14: FURB101 `open` and `read` should be replaced by `Path(qmd).read_text()`
- .github/workflows/algolia/upload-algolia-api.py:165:14: FURB101 `open` and `read` should be replaced by `Path(qmd).read_text()`

zulip/zulip (+1 -1 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --no-fix --output-format concise --preview --select ALL

+ zerver/lib/test_helpers.py:766:10: FURB103 [*] `open` and `write` should be replaced by `Path(filepath).write_text("zulip!")`
- zerver/lib/test_helpers.py:766:10: FURB103 [*] `open` and `write` should be replaced by `Path(filepath).write_text("zulip!")`

astropy/astropy (+2 -3 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --no-fix --output-format concise --preview

+ astropy/io/ascii/tests/test_read.py:1776:30: FURB101 `open` and `read` should be replaced by `Path(fpath).read_text()`
- astropy/io/ascii/tests/test_read.py:1776:30: FURB101 `open` and `read` should be replaced by `Path(fpath).read_text()`
+ astropy/io/ascii/tests/test_read.py:2164:14: FURB101 [*] `open` and `read` should be replaced by `Path(filename).read_text()`
- astropy/io/ascii/tests/test_read.py:2164:14: FURB101 [*] `open` and `read` should be replaced by `Path(filename).read_text()`
- astropy/utils/tests/test_data.py:605:14: FURB103 [*] `open` and `write` should be replaced by `Path(f_name).write_text("old")`

Changes by rule (2 rules affected)

code	total	+ violation	- violation	+ fix	- fix
FURB101	6	3	3	0	0
FURB103	5	2	3	0	0

amyreese

Thanks for working on this. Overall I think this is a very large amount of code. Is all of this actually necessary just to see if a variable is used somewhere else? Can we skip checking if it's rebound elsewhere? Erring on the side of a false negative would generally be better than false positives, and if that could greatly reduce the amount of logic necessary, that may be worth it.

amyreese · 2026-02-24T22:20:30Z

+    let following_statements = following_statements_after_with(
+        with,
+        checker.semantic().current_statement_parent(),
+        checker.python_ast(),
+    );
+    let candidates = find_file_opens(


Rather than doing up-front work to find all the statements for every with block, even if it has nothing to do with opening a file, this should first see if there are any candidates, and only then fetch the following statements and filter the list of candidates afterwards.

Or at the very least, the call to get following statements should happen further inside of say, resolve_file_open where the data will actually be used, at the point that it will actually be needed and no sooner.

amyreese · 2026-02-24T22:53:51Z

Also, looking at the ecosystem results, it seems we're already pushing towards false negatives here, so I'm not sure how much this is actually benefiting the rule. Were there any false positives in the ecosystem report that should have been resolved with this PR?

chirizxc · 2026-02-24T23:05:07Z

Also, looking at the ecosystem results, it seems we're already pushing towards false negatives here, so I'm not sure how much this is actually benefiting the rule. Were there any false positives in the ecosystem report that should have been resolved with this PR?

I looked at the changes in the ecosystem from the bot's post, none of these changes are false negatives, since the variables below are used in f.name or f.is_file()

amyreese · 2026-02-24T23:19:33Z

I looked at the changes in the ecosystem from the bot's post, none of these changes are false negatives, since the variables below are used in f.name or f.is_file()

maybe I'm missing something, but f in the airflow ecosystem examples are rebound as part of the comprehensions, so they were legit positives that have been silenced with this PR:

with open(file_path, "w") as f:
    f.write("hello world")

...

files_in_repo = {f.name for f in bundle.path.iterdir() if f.is_file()}

note the for f in ... part of the comprehension means f.name and f.is_file() are not referring to the same f from the context manager above.

chirizxc · 2026-02-25T07:42:21Z

I looked at the changes in the ecosystem from the bot's post, none of these changes are false negatives, since the variables below are used in f.name or f.is_file()

maybe I'm missing something, but f in the airflow ecosystem examples are rebound as part of the comprehensions, so they were legit positives that have been silenced with this PR:
with open(file_path, "w") as f:
    f.write("hello world")

...

files_in_repo = {f.name for f in bundle.path.iterdir() if f.is_file()}
note the for f in ... part of the comprehension means f.name and f.is_file() are not referring to the same f from the context manager above.

Yes, you were right, when I looked at these bot ecosystem results, I didn't pay attention

amyreese · 2026-02-28T00:18:01Z

Overall I'm still concerned about the amount of code here, especially when it resolves only a single false positive in the ecosystem report. Would prefer that this is simplified, and lean more on the existing features of the semantic model rather than reimplementing its own version of semantic model and control flow. Brent suggested that only_binding might be helpful here, or maybe consider just return early if the binding is used for anything beyond the read call, without trying to map control flow?

chirizxc · 2026-02-28T20:59:38Z

Overall I'm still concerned about the amount of code here, especially when it resolves only a single false positive in the ecosystem report. Would prefer that this is simplified, and lean more on the existing features of the semantic model rather than reimplementing its own version of semantic model and control flow. Brent suggested that only_binding might be helpful here, or maybe consider just return early if the binding is used for anything beyond the read call, without trying to map control flow?

I will try to reduce the amount of code, but ecosystem analysis projects do not involve all Python code, so I think there is more than one case.

ntBre · 2026-03-02T20:01:42Z

I was mostly surprised that we need a new Visitor here. Would moving the rule to a different analysis phase help? I thought we had pretty nice helpers for checking if a variable is used later without tracking that information in a new visitor.

chirizxc · 2026-03-02T22:50:33Z

I was mostly surprised that we need a new Visitor here. Would moving the rule to a different analysis phase help? I thought we had pretty nice helpers for checking if a variable is used later without tracking that information in a new visitor.

Hmm, I didn't even know about that. It seems more logical now. Thank you very much.

amyreese

Looks much better to me, but I'm not quite familiar with the analysis bits.

amyreese · 2026-03-03T20:11:56Z

Will wait for @ntBre to take a look.

ntBre

Thank you! Yes, this makes sense to me. I'm slightly wary of deferring too many checks, especially since I made a similar suggestion twice in quick succession after not using it much before, but this does seem better than trying to restructure the rules to fit into deferred_scopes. I also don't see any negative perf effects of the deferral, which makes sense to me given how lightweight the snapshots are.

I think this is fine as-is, but if we defer any more types of statements, it probably makes sense to have a single deferred_statements with a match on the statement kind instead of adding more deferred_for_loops, deferred_with_statements type functions and fields.

* main: [ty] Split up `types/class.rs` (#23714) [ty] Rework module resolution to be breadth-first instead of depth-first (#22449) [ty] Move tests and type-alias-related code out of `types.rs` (#23711) [ty] Move TypeVar-related code to a `types::typevar` submodule (#23710) Fail CI on new linter ecosystem panics (#23597) [ty] Fix handling of non-Python text documents [ty] Move `CallableType`, and related methods/types, to a new `types::callable` submodule (#23707) [ty] Avoid stack overflow with recursive typevar (#23652) [ty] Add a diagnostic for an unused awaitable (#23650) [ty] Fix union `*args` binding for optional positional parameters (#23124) [`refurb`] Fix `FURB101` and `FURB103` false positives when I/O variable is used later (#23542) [ty] Fix type checking for multi-member enums within in a function block (#23683) [ty] Improve folding for decorators (#23543) [`airflow`] Extract common utilities for use in new rules (#23630)

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Expand the default rule set ([#23385](astral-sh/ruff#23385)) In preview, Ruff now enables a significantly expanded default rule set of 412 rules, up from the stable default set of 59 rules. The new rules are mostly a superset of the stable defaults, with the exception of these rules, which are removed from the preview defaults: - [`multiple-imports-on-one-line`](https://docs.astral.sh/ruff/rules/multiple-imports-on-one-line) (`E401`) - [`module-import-not-at-top-of-file`](https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file) (`E402`) - [`module-import-not-at-top-of-file`](https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file) (`E701`) - [`multiple-statements-on-one-line-semicolon`](https://docs.astral.sh/ruff/rules/multiple-statements-on-one-line-semicolon) (`E702`) - [`useless-semicolon`](https://docs.astral.sh/ruff/rules/useless-semicolon) (`E703`) - [`none-comparison`](https://docs.astral.sh/ruff/rules/none-comparison) (`E711`) - [`true-false-comparison`](https://docs.astral.sh/ruff/rules/true-false-comparison) (`E712`) - [`not-in-test`](https://docs.astral.sh/ruff/rules/not-in-test) (`E713`) - [`not-is-test`](https://docs.astral.sh/ruff/rules/not-is-test) (`E714`) - [`type-comparison`](https://docs.astral.sh/ruff/rules/type-comparison) (`E721`) - [`lambda-assignment`](https://docs.astral.sh/ruff/rules/lambda-assignment) (`E731`) - [`ambiguous-variable-name`](https://docs.astral.sh/ruff/rules/ambiguous-variable-name) (`E741`) - [`ambiguous-class-name`](https://docs.astral.sh/ruff/rules/ambiguous-class-name) (`E742`) - [`ambiguous-function-name`](https://docs.astral.sh/ruff/rules/ambiguous-function-name) (`E743`) - [`undefined-local-with-import-star`](https://docs.astral.sh/ruff/rules/undefined-local-with-import-star) (`F403`) - [`undefined-local-with-import-star-usage`](https://docs.astral.sh/ruff/rules/undefined-local-with-import-star-usage) (`F405`) - [`undefined-local-with-nested-import-star-usage`](https://docs.astral.sh/ruff/rules/undefined-local-with-nested-import-star-usage) (`F406`) - [`forward-annotation-syntax-error`](https://docs.astral.sh/ruff/rules/forward-annotation-syntax-error) (`F722`) If you use preview and prefer the old defaults, you can restore them with configuration like: ```toml # ruff.toml [lint] select = ["E4", "E7", "E9", "F"] # pyproject.toml [tool.ruff.lint] select = ["E4", "E7", "E9", "F"] ``` If you do give them a try, feel free to share your feedback in the [GitHub discussion](astral-sh/ruff#23203)! - \[`flake8-pyi`] Also check string annotations (`PYI041`) ([#19023](astral-sh/ruff#19023)) - \[`flake8-async`] Fix `in_async_context` logic ([#23426](astral-sh/ruff#23426)) - \[`ruff`] Fix for `RUF102` should delete entire comment ([#23380](astral-sh/ruff#23380)) - \[`ruff`] Suppress diagnostic for strings with backslashes in interpolations before Python 3.12 (`RUF027`) ([#21069](astral-sh/ruff#21069)) - \[`flake8-bugbear`] Fix `B023` false positive for immediately-invoked lambdas ([#23294](astral-sh/ruff#23294)) - \[parser] Fix false syntax error for match-like annotated assignments ([#23297](astral-sh/ruff#23297)) - \[parser] Fix indentation tracking after line continuations ([#23417](astral-sh/ruff#23417)) - \[`flake8-executable`] Allow global flags in uv shebangs (`EXE003`) ([#22582](astral-sh/ruff#22582)) - \[`pyupgrade`] Fix handling of `typing.{io,re}` (`UP035`) ([#23131](astral-sh/ruff#23131)) - \[`ruff`] Detect `PLC0207` on chained `str.split()` calls ([#23275](astral-sh/ruff#23275)) - Remove invalid inline `noqa` warning ([#23270](astral-sh/ruff#23270)) - Add extension mapping to configuration file options ([#23384](astral-sh/ruff#23384)) - Add `Q004` to the list of conflicting rules ([#23340](astral-sh/ruff#23340)) - \[`ruff`] Expand `lint.external` docs and add sub-diagnostic (`RUF100`, `RUF102`) ([#23268](astral-sh/ruff#23268)) - [@dylwil3](https://github.com/dylwil3) - [@Jkhall81](https://github.com/Jkhall81) - [@danparizher](https://github.com/danparizher) - [@dhruvmanila](https://github.com/dhruvmanila) - [@harupy](https://github.com/harupy) - [@ngnpope](https://github.com/ngnpope) - [@amyreese](https://github.com/amyreese) - [@kar-ganap](https://github.com/kar-ganap) - [@robsdedude](https://github.com/robsdedude) - [@shaanmajid](https://github.com/shaanmajid) - [@ntBre](https://github.com/ntBre) - [@toslunar](https://github.com/toslunar) Released on 2026-02-12. - \[`airflow`] Add ruff rules to catch deprecated Airflow imports for Airflow 3.1 (`AIR321`) ([#22376](astral-sh/ruff#22376)) - \[`airflow`] Third positional parameter not named `ti_key` should be flagged for `BaseOperatorLink.get_link` (`AIR303`) ([#22828](astral-sh/ruff#22828)) - \[`flake8-gettext`] Fix false negatives for plural argument of `ngettext` (`INT001`, `INT002`, `INT003`) ([#21078](astral-sh/ruff#21078)) - \[`pyflakes`] Fix infinite loop in preview fix for `unused-import` (`F401`) ([#23038](astral-sh/ruff#23038)) - \[`pygrep-hooks`] Detect non-existent mock methods in standalone expressions (`PGH005`) ([#22830](astral-sh/ruff#22830)) - \[`pylint`] Allow dunder submodules and improve diagnostic range (`PLC2701`) ([#22804](astral-sh/ruff#22804)) - \[`pyupgrade`] Improve diagnostic range for tuples (`UP024`) ([#23013](astral-sh/ruff#23013)) - \[`refurb`] Check subscripts in tuple do not use lambda parameters in `reimplemented-operator` (`FURB118`) ([#23079](astral-sh/ruff#23079)) - \[`ruff`] Detect mutable defaults in `field` calls (`RUF008`) ([#23046](astral-sh/ruff#23046)) - \[`ruff`] Ignore std `cmath.inf` (`RUF069`) ([#23120](astral-sh/ruff#23120)) - \[`ruff`] New rule `float-equality-comparison` (`RUF069`) ([#20585](astral-sh/ruff#20585)) - Don't format unlabeled Markdown code blocks ([#23106](astral-sh/ruff#23106)) - Markdown formatting support in LSP ([#23063](astral-sh/ruff#23063)) - Support Quarto Markdown language markers ([#22947](astral-sh/ruff#22947)) - Support formatting `pycon` Markdown code blocks ([#23112](astral-sh/ruff#23112)) - Use extension mapping to select Markdown code block language ([#22934](astral-sh/ruff#22934)) - Avoid false positive for undefined variables in `FAST001` ([#23224](astral-sh/ruff#23224)) - Avoid introducing syntax errors for `FAST003` autofix ([#23227](astral-sh/ruff#23227)) - Avoid suggesting `InitVar` for `__post_init__` that references PEP 695 type parameters ([#23226](astral-sh/ruff#23226)) - Deduplicate type variables in generic functions ([#23225](astral-sh/ruff#23225)) - Fix exception handler parenthesis removal for Python 3.14+ ([#23126](astral-sh/ruff#23126)) - Fix f-string middle panic when parsing t-strings ([#23232](astral-sh/ruff#23232)) - Wrap `RUF020` target for multiline fixes ([#23210](astral-sh/ruff#23210)) - Wrap `UP007` target for multiline fixes ([#23208](astral-sh/ruff#23208)) - Fix missing diagnostics for last range suppression in file ([#23242](astral-sh/ruff#23242)) - \[`pyupgrade`] Fix syntax error on string with newline escape and comment (`UP037`) ([#22968](astral-sh/ruff#22968)) - Use `ruff` instead of `Ruff` as the program name in GitHub output format ([#23240](astral-sh/ruff#23240)) - \[`PT006`] Fix syntax error when unpacking nested tuples in `parametrize` fixes ([#22441](astral-sh/ruff#22441)) ([#22464](astral-sh/ruff#22464)) - \[`airflow`] Catch deprecated attribute access from context key for Airflow 3.0 (`AIR301`) ([#22850](astral-sh/ruff#22850)) - \[`airflow`] Capture deprecated arguments and a decorator (`AIR301`) ([#23170](astral-sh/ruff#23170)) - \[`flake8-boolean-trap`] Add `multiprocessing.Value` to excluded functions for `FBT003` ([#23010](astral-sh/ruff#23010)) - \[`flake8-bugbear`] Add a secondary annotation showing the previous occurrence (`B033`) ([#22634](astral-sh/ruff#22634)) - \[`flake8-type-checking`] Add sub-diagnostic showing the runtime use of an annotation (`TC004`) ([#23091](astral-sh/ruff#23091)) - \[`isort`] Support configurable import section heading comments ([#23151](astral-sh/ruff#23151)) - \[`ruff`] Improve the diagnostic for `RUF012` ([#23202](astral-sh/ruff#23202)) - Suppress diagnostic output for `format --check --silent` ([#17736](astral-sh/ruff#17736)) - Add tabbed shell completion documentation ([#23169](astral-sh/ruff#23169)) - Explain how to enable Markdown formatting for pre-commit hook ([#23077](astral-sh/ruff#23077)) - Fixed import in `runtime-evaluated-decorators` example ([#23187](astral-sh/ruff#23187)) - Update ruff server contributing guide ([#23060](astral-sh/ruff#23060)) - Exclude WASM artifacts from GitHub releases ([#23221](astral-sh/ruff#23221)) - [@mkniewallner](https://github.com/mkniewallner) - [@bxff](https://github.com/bxff) - [@dylwil3](https://github.com/dylwil3) - [@Avasam](https://github.com/Avasam) - [@amyreese](https://github.com/amyreese) - [@charliermarsh](https://github.com/charliermarsh) - [@Alex-ley-scrub](https://github.com/Alex-ley-scrub) - [@Kalmaegi](https://github.com/Kalmaegi) - [@danparizher](https://github.com/danparizher) - [@AiyionPrime](https://github.com/AiyionPrime) - [@eureka928](https://github.com/eureka928) - [@11happy](https://github.com/11happy) - [@Jkhall81](https://github.com/Jkhall81) - [@chirizxc](https://github.com/chirizxc) - [@leandrobbraga](https://github.com/leandrobbraga) - [@tvatter](https://github.com/tvatter) - [@anishgirianish](https://github.com/anishgirianish) - [@shaanmajid](https://github.com/shaanmajid) - [@ntBre](https://github.com/ntBre) - [@sjyangkevin](https://github.com/sjyangkevin) Released on 2026-02-03. Check out the [blog post](https://astral.sh/blog/ruff-v0.15.0) for a migration guide and overview of the changes! - Ruff now formats your code according to the 2026 style guide. See the formatter section below or in the blog post for a detailed list of changes. - The linter now supports block suppression comments. For example, to suppress `N803` for all parameters in this function: ```python # ruff: disable[N803] def foo( legacyArg1, legacyArg2, legacyArg3, legacyArg4, ): ... # ruff: enable[N803] ``` See the [documentation](https://docs.astral.sh/ruff/linter/#block-level) for more details. - The `ruff:alpine` Docker image is now based on Alpine 3.23 (up from 3.21). - The `ruff:debian` and `ruff:debian-slim` Docker images are now based on Debian 13 "Trixie" instead of Debian 12 "Bookworm." - Binaries for the `ppc64` (64-bit big-endian PowerPC) architecture are no longer included in our releases. It should still be possible to build Ruff manually for this platform, if needed. - Ruff now resolves all `extend`ed configuration files before falling back on a default Python version. The following rules have been stabilized and are no longer in preview: - [`blocking-http-call-httpx-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-http-call-httpx-in-async-function) (`ASYNC212`) - [`blocking-path-method-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-path-method-in-async-function) (`ASYNC240`) - [`blocking-input-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-input-in-async-function) (`ASYNC250`) - [`map-without-explicit-strict`](https://docs.astral.sh/ruff/rules/map-without-explicit-strict) (`B912`) - [`if-exp-instead-of-or-operator`](https://docs.astral.sh/ruff/rules/if-exp-instead-of-or-operator) (`FURB110`) - [`single-item-membership-test`](https://docs.astral.sh/ruff/rules/single-item-membership-test) (`FURB171`) - [`missing-maxsplit-arg`](https://docs.astral.sh/ruff/rules/missing-maxsplit-arg) (`PLC0207`) - [`unnecessary-lambda`](https://docs.astral.sh/ruff/rules/unnecessary-lambda) (`PLW0108`) - [`unnecessary-empty-iterable-within-deque-call`](https://docs.astral.sh/ruff/rules/unnecessary-empty-iterable-within-deque-call) (`RUF037`) - [`in-empty-collection`](https://docs.astral.sh/ruff/rules/in-empty-collection) (`RUF060`) - [`legacy-form-pytest-raises`](https://docs.astral.sh/ruff/rules/legacy-form-pytest-raises) (`RUF061`) - [`non-octal-permissions`](https://docs.astral.sh/ruff/rules/non-octal-permissions) (`RUF064`) - [`invalid-rule-code`](https://docs.astral.sh/ruff/rules/invalid-rule-code) (`RUF102`) - [`invalid-suppression-comment`](https://docs.astral.sh/ruff/rules/invalid-suppression-comment) (`RUF103`) - [`unmatched-suppression-comment`](https://docs.astral.sh/ruff/rules/unmatched-suppression-comment) (`RUF104`) - [`replace-str-enum`](https://docs.astral.sh/ruff/rules/replace-str-enum) (`UP042`) The following behaviors have been stabilized: - The `--output-format` flag is now respected when running Ruff in `--watch` mode, and the `full` output format is now used by default, matching the regular CLI output. - [`builtin-attribute-shadowing`](https://docs.astral.sh/ruff/rules/builtin-attribute-shadowing/) (`A003`) now detects the use of shadowed built-in names in additional contexts like decorators, default arguments, and other attribute definitions. - [`duplicate-union-member`](https://docs.astral.sh/ruff/rules/duplicate-union-member/) (`PYI016`) now considers `typing.Optional` when searching for duplicate union members. - [`split-static-string`](https://docs.astral.sh/ruff/rules/split-static-string/) (`SIM905`) now offers an autofix when the `maxsplit` argument is provided, even without a `sep` argument. - [`dict-get-with-none-default`](https://docs.astral.sh/ruff/rules/dict-get-with-none-default/) (`SIM910`) now applies to more types of key expressions. - [`super-call-with-parameters`](https://docs.astral.sh/ruff/rules/super-call-with-parameters/) (`UP008`) now has a safe fix when it will not delete comments. - [`unnecessary-default-type-args`](https://docs.astral.sh/ruff/rules/unnecessary-default-type-args/) (`UP043`) now applies to stub (`.pyi`) files on Python versions before 3.13. This release introduces the new 2026 style guide, with the following changes: - Lambda parameters are now kept on the same line and lambda bodies will be parenthesized to let them break across multiple lines ([#21385](astral-sh/ruff#21385)) - Parentheses around tuples of exceptions in `except` clauses will now be removed on Python 3.14 and later ([#20768](astral-sh/ruff#20768)) - A single empty line is now permitted at the beginning of function bodies ([#21110](astral-sh/ruff#21110)) - Parentheses are avoided for long `as` captures in `match` statements ([#21176](astral-sh/ruff#21176)) - Extra spaces between escaped quotes and ending triple quotes can now be omitted ([#17216](astral-sh/ruff#17216)) - Blank lines are now enforced before classes with decorators in stub files ([#18888](astral-sh/ruff#18888)) - Apply formatting to Markdown code blocks ([#22470](astral-sh/ruff#22470), [#22990](astral-sh/ruff#22990), [#22996](astral-sh/ruff#22996)) See the [documentation](https://docs.astral.sh/ruff/formatter/#markdown-code-formatting) for more details. - Fix suppression indentation matching ([#22903](astral-sh/ruff#22903)) - Customize where the `fix_title` sub-diagnostic appears ([#23044](astral-sh/ruff#23044)) - \[`FastAPI`] Add sub-diagnostic explaining why a fix was unavailable (`FAST002`) ([#22565](astral-sh/ruff#22565)) - \[`flake8-annotations`] Don't suggest `NoReturn` for functions raising `NotImplementedError` (`ANN201`, `ANN202`, `ANN205`, `ANN206`) ([#21311](astral-sh/ruff#21311)) - \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP017`) ([#22873](astral-sh/ruff#22873)) - \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP020`) ([#22872](astral-sh/ruff#22872)) - \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP033`) ([#22871](astral-sh/ruff#22871)) - \[`refurb`] Do not add `abc.ABC` if already present (`FURB180`) ([#22234](astral-sh/ruff#22234)) - \[`refurb`] Make fix unsafe if it deletes comments (`FURB110`) ([#22768](astral-sh/ruff#22768)) - \[`ruff`] Add sub-diagnostics with permissions (`RUF064`) ([#22972](astral-sh/ruff#22972)) - Identify notebooks by LSP `didOpen` instead of `.ipynb` file extension ([#22810](astral-sh/ruff#22810)) - Add `--color` CLI option to force colored output ([#22806](astral-sh/ruff#22806)) - Document `-` stdin convention in CLI help text ([#22817](astral-sh/ruff#22817)) - \[`refurb`] Change example to `re.search` with `^` anchor (`FURB167`) ([#22984](astral-sh/ruff#22984)) - Fix link to Sphinx code block directives ([#23041](astral-sh/ruff#23041)) - \[`pydocstyle`] Clarify which quote styles are allowed (`D300`) ([#22825](astral-sh/ruff#22825)) - \[`flake8-bugbear`] Improve docs for `no-explicit-stacklevel` (`B028`) ([#22538](astral-sh/ruff#22538)) - Update MSRV to 1.91 ([#22874](astral-sh/ruff#22874)) - [@danparizher](https://github.com/danparizher) - [@chirizxc](https://github.com/chirizxc) - [@amyreese](https://github.com/amyreese) - [@Jkhall81](https://github.com/Jkhall81) - [@cwkang1998](https://github.com/cwkang1998) - [@manzt](https://github.com/manzt) - [@11happy](https://github.com/11happy) - [@hugovk](https://github.com/hugovk) - [@caiquejjx](https://github.com/caiquejjx) - [@ntBre](https://github.com/ntBre) - [@akawd](https://github.com/akawd) - [@konstin](https://github.com/konstin) Renovate-Branch: renovate/2024.6-ruff-0.x Change-Id: I8f8e865435fde1fc736fe2528261a604acb46215 Priv-Id: f7e1d99008e3617149c4b639a9a2bbc06212d064

chirizxc added 2 commits February 24, 2026 20:06

[refurb] Fix FURB101, FURB103

1ea6f03

cargo fmt --all

0c57022

fix clippy

9403238

chirizxc changed the title ~~[refurb] Fix FURB101, FURB103~~ [refurb] Fix FURB101 and FURB103 false positives when I/O variable is used later Feb 24, 2026

add snap's

db240c2

chirizxc changed the title ~~[refurb] Fix FURB101 and FURB103 false positives when I/O variable is used later~~ [refurb] Fix FURB101 and FURB103 false positives when I/O variable is used later Feb 24, 2026

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fix

9421266

amyreese suggested changes Feb 24, 2026

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amyreese added the fixes Related to suggested fixes for violations label Feb 24, 2026

amyreese self-assigned this Feb 25, 2026

chirizxc added 2 commits February 25, 2026 10:06

some fixes

660e94a

fmt

5e42d3d

chirizxc marked this pull request as draft February 25, 2026 07:08

chirizxc added 3 commits February 25, 2026 10:15

fix clippy

9b38563

refactor

a731a67

update

cc6df68

chirizxc marked this pull request as ready for review February 26, 2026 18:55

chirizxc added 5 commits March 1, 2026 14:42

update

ce117a5

update

3121d9c

update

0068158

update

73218bb

fix clippy

89f08bb

chirizxc added 4 commits March 3, 2026 01:50

analysis phase

f14a311

unused pub(crate)

0f78569

update

ffa9c4a

minimize diff

0b33f60

amyreese approved these changes Mar 3, 2026

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amyreese requested a review from ntBre March 3, 2026 20:11

Merge branch 'main' into FURB10_{1,3}

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ntBre approved these changes Mar 3, 2026

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ntBre added the preview Related to preview mode features label Mar 3, 2026

amyreese merged commit d740e84 into astral-sh:main Mar 4, 2026
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BrewTestBot mentioned this pull request Mar 5, 2026

ruff 0.15.5 Homebrew/homebrew-core#270824

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chirizxc commented Feb 24, 2026

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