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## Summary https://github.com/astral-sh/ruff/pull/20165 added a lot of false positives around calls to `builtins.open()`, because our missing support for PEP-613 type aliases means that we don't understand typeshed's overloads for `builtins.open()` at all yet, and therefore always select the first overload. This didn't use to matter very much, but now that we have a much stricter implementation of protocol assignability/subtyping it matters a lot, because most of the stdlib functions dealing with I/O (`pickle`, `marshal`, `io`, `json`, etc.) are annotated in typeshed as taking in protocols of some kind. In lieu of full PEP-613 support, which is blocked on various things and might not land in time for our next alpha release, this PR adds some temporary special-casing for `builtins.open()` to avoid the false positives. We just infer `Todo` for anything that isn't meant to match typeshed's first `open()` overload. This should be easy to rip out again once we have proper support for PEP-613 type aliases, which hopefully should be pretty soon! ## Test Plan Added an mdtest |
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| .. | ||
| ruff | ||
| ruff_annotate_snippets | ||
| ruff_benchmark | ||
| ruff_cache | ||
| ruff_db | ||
| ruff_dev | ||
| ruff_diagnostics | ||
| ruff_formatter | ||
| ruff_graph | ||
| ruff_index | ||
| ruff_linter | ||
| ruff_macros | ||
| ruff_memory_usage | ||
| ruff_notebook | ||
| ruff_options_metadata | ||
| ruff_python_ast | ||
| ruff_python_ast_integration_tests | ||
| ruff_python_codegen | ||
| ruff_python_formatter | ||
| ruff_python_index | ||
| ruff_python_literal | ||
| ruff_python_parser | ||
| ruff_python_semantic | ||
| ruff_python_stdlib | ||
| ruff_python_trivia | ||
| ruff_python_trivia_integration_tests | ||
| ruff_server | ||
| ruff_source_file | ||
| ruff_text_size | ||
| ruff_wasm | ||
| ruff_workspace | ||
| ty | ||
| ty_combine | ||
| ty_ide | ||
| ty_project | ||
| ty_python_semantic | ||
| ty_server | ||
| ty_static | ||
| ty_test | ||
| ty_vendored | ||
| ty_wasm | ||