Fix off-by one error in the LineIndex::offset calculation
#13407
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Nice! |
The old snapshot was incorrect because the format range excluded the first (all empty) line. Now the first line gets formatted also.
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netbsd-srcmastr
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Oct 7, 2024
## 0.6.9 ### Preview features - Fix codeblock dynamic line length calculation for indented docstring examples ([#13523](astral-sh/ruff#13523)) - \[`refurb`\] Mark `FURB118` fix as unsafe ([#13613](astral-sh/ruff#13613)) ### Rule changes - \[`pydocstyle`\] Don't raise `D208` when last line is non-empty ([#13372](astral-sh/ruff#13372)) - \[`pylint`\] Preserve trivia (i.e. comments) in `PLR5501` autofix ([#13573](astral-sh/ruff#13573)) ### Configuration - \[`pyflakes`\] Add `allow-unused-imports` setting for `unused-import` rule (`F401`) ([#13601](astral-sh/ruff#13601)) ### Bug fixes - Support ruff discovery in pip build environments ([#13591](astral-sh/ruff#13591)) - \[`flake8-bugbear`\] Avoid short circuiting `B017` for multiple context managers ([#13609](astral-sh/ruff#13609)) - \[`pylint`\] Do not offer an invalid fix for `PLR1716` when the comparisons contain parenthesis ([#13527](astral-sh/ruff#13527)) - \[`pyupgrade`\] Fix `UP043` to apply to `collections.abc.Generator` and `collections.abc.AsyncGenerator` ([#13611](astral-sh/ruff#13611)) - \[`refurb`\] Fix handling of slices in tuples for `FURB118`, e.g., `x[:, 1]` ([#13518](astral-sh/ruff#13518)) ### Documentation - Update GitHub Action link to `astral-sh/ruff-action` ([#13551](astral-sh/ruff#13551)) ## 0.6.8 ### Preview features - Remove unnecessary parentheses around `match case` clauses ([#13510](astral-sh/ruff#13510)) - Parenthesize overlong `if` guards in `match..case` clauses ([#13513](astral-sh/ruff#13513)) - Detect basic wildcard imports in `ruff analyze graph` ([#13486](astral-sh/ruff#13486)) - \[`pylint`\] Implement `boolean-chained-comparison` (`R1716`) ([#13435](astral-sh/ruff#13435)) ### Rule changes - \[`lake8-simplify`\] Detect `SIM910` when using variadic keyword arguments, i.e., `**kwargs` ([#13503](astral-sh/ruff#13503)) - \[`pyupgrade`\] Avoid false negatives with non-reference shadowed bindings of loop variables (`UP028`) ([#13504](astral-sh/ruff#13504)) ### Bug fixes - Detect tuples bound to variadic positional arguments i.e. `*args` ([#13512](astral-sh/ruff#13512)) - Exit gracefully on broken pipe errors ([#13485](astral-sh/ruff#13485)) - Avoid panic when analyze graph hits broken pipe ([#13484](astral-sh/ruff#13484)) ### Performance - Reuse `BTreeSets` in module resolver ([#13440](astral-sh/ruff#13440)) - Skip traversal for non-compound statements ([#13441](astral-sh/ruff#13441)) ## 0.6.7 ### Preview features - Add Python version support to ruff analyze CLI ([#13426](astral-sh/ruff#13426)) - Add `exclude` support to `ruff analyze` ([#13425](astral-sh/ruff#13425)) - Fix parentheses around return type annotations ([#13381](astral-sh/ruff#13381)) ### Rule changes - \[`pycodestyle`\] Fix: Don't autofix if the first line ends in a question mark? (D400) ([#13399](astral-sh/ruff#13399)) ### Bug fixes - Respect `lint.exclude` in ruff check `--add-noqa` ([#13427](astral-sh/ruff#13427)) ### Performance - Avoid tracking module resolver files in Salsa ([#13437](astral-sh/ruff#13437)) - Use `forget` for module resolver database ([#13438](astral-sh/ruff#13438)) ## 0.6.6 ### Preview features - \[`refurb`\] Skip `slice-to-remove-prefix-or-suffix` (`FURB188`) when non-trivial slice steps are present ([#13405](astral-sh/ruff#13405)) - Add a subcommand to generate dependency graphs ([#13402](astral-sh/ruff#13402)) ### Formatter - Fix placement of inline parameter comments ([#13379](astral-sh/ruff#13379)) ### Server - Fix off-by one error in the `LineIndex::offset` calculation ([#13407](astral-sh/ruff#13407)) ### Bug fixes - \[`fastapi`\] Respect FastAPI aliases in route definitions ([#13394](astral-sh/ruff#13394)) - \[`pydocstyle`\] Respect word boundaries when detecting function signature in docs ([#13388](astral-sh/ruff#13388)) ### Documentation - Add backlinks to rule overview linter ([#13368](astral-sh/ruff#13368)) - Fix documentation for editor vim plugin ALE ([#13348](astral-sh/ruff#13348)) - Fix rendering of `FURB188` docs ([#13406](astral-sh/ruff#13406))
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Summary
This fixes an error where Emacs showed obscure syntax errors.
The reason for the obscure syntax errors was that Ruff incorrectly
applied the change updates from emacs because of an off-by-one error
in the UTF32 to UTF8 offset calculation. When you add a new type wrapper to make it clear that the offsets are one-based and you still get it wrong 🤷
We didn't notice this error before because VS code always uses UTF 16 and
I think neovim uses UTF8. The same method is also used to detect the format range.
But it was never significant there because range formatting always extends the range to the enclosing statement.
Fixes emacs-lsp/lsp-mode#4547
Fixes astral-sh/ruff-lsp#495
and possibly #13392
Test Plan
Added tests. I used emacs with a debug build that contains the fix and I no longer
observed any stale/obscure syntax errors