Raise syntax error when \ is at end of file
#17409
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ntBre
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Apr 15, 2025
sharkdp
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## Summary This PR fixes a bug in the lexer specifically around line continuation character at end of file. The reason this was occurring is because the lexer wouldn't check for EOL _after_ consuming the escaped newline but only if the EOL was right after the line continuation character. fixes: #17398 ## Test Plan Add tests for the scenarios where this should occur mainly (a) when the state is `AfterNewline` and (b) when the state is `Other`.
dcreager
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* main: (44 commits) [`airflow`] Extend `AIR311` rules (#17422) [red-knot] simplify union size limit handling (#17429) [`airflow`] Extract `AIR311` from `AIR301` rules (`AIR301`, `AIR311`) (#17310) [red-knot] set a size limit on unions of literals (#17419) [red-knot] make large-union benchmark slow again (#17418) [red-knot] optimize building large unions of literals (#17403) [red-knot] Fix comments in type_api.md (#17425) [red-knot] Do not assume that `x != 0` if `x` inhabits `~Literal[0]` (#17370) [red-knot] make large-union benchmark more challenging (#17416) [red-knot] Acknowledge that `T & anything` is assignable to `T` (#17413) Update Rust crate clap to v4.5.36 (#17381) Raise syntax error when `\` is at end of file (#17409) [red-knot] Add regression tests for narrowing constraints cycles (#17408) [red-knot] Add some knowledge of `__all__` to `*`-import machinery (#17373) Update taiki-e/install-action digest to be7c31b (#17379) Update Rust crate mimalloc to v0.1.46 (#17382) Update PyO3/maturin-action action to v1.49.1 (#17384) Update Rust crate anyhow to v1.0.98 (#17380) dependencies: switch from `chrono` to `jiff` Update Rust crate bstr to v1.12.0 (#17385) ...
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Summary
This PR fixes a bug in the lexer specifically around line continuation character at end of file.
The reason this was occurring is because the lexer wouldn't check for EOL after consuming the escaped newline but only if the EOL was right after the line continuation character.
fixes: #17398
Test Plan
Add tests for the scenarios where this should occur mainly (a) when the state is
AfterNewlineand (b) when the state isOther.