[red-knot] Detect division-by-zero in unions and intersections#17157
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[red-knot] Detect division-by-zero in unions and intersections#17157
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AlexWaygood
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carljm
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dcreager
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* origin/main: (35 commits) [red-knot] Callable types are disjoint from literals (#17160) [red-knot] Fix inference for `pow` between two literal integers (#17161) [red-knot] Add GitHub PR annotations when mdtests fail in CI (#17150) [red-knot] Fix equivalence of differently ordered unions that contain `Callable` types (#17145) [red-knot] Add initial set of tests for unreachable code (#17159) [`airflow`] Move `AIR302` to `AIR301` and `AIR303` to `AIR302` (#17151) ruff_db: simplify lifetimes on `DiagnosticDisplay` [red-knot] Detect division-by-zero in unions and intersections (#17157) [`airflow`] Add autofix infrastructure to `AIR302` name checks (#16965) [`flake8-bandit`] Mark `str` and `list[str]` literals as trusted input (`S603`) (#17136) [`airflow`] Add autofix for `AIR302` attribute checks (#16977) [`airflow`] Extend `AIR302` with additional symbols (#17085) [`airflow`] Move `AIR301` to `AIR002` (#16978) [`airflow`] Add autofix for `AIR302` method checks (#16976) ruff_db: switch diagnostic rendering over to `std::fmt::Display` [red-knot] Add 'Goto type definition' to the playground (#17055) red_knot_ide: update snapshots red_knot_python_semantic: remove comment about `TypeCheckDiagnostic` ruff_db: delete most of the old diagnostic code red_knot: use `Diagnostic` inside of red knot ...
dcreager
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* origin/main: (82 commits) [red-knot] Fix more [redundant-cast] false positives (#17170) [red-knot] Three-argument type-calls take 'str' as the first argument (#17168) Control flow: `return` and `raise` (#17121) Bump 0.11.3 (#17173) [red-knot] Improve `Debug` implementation for `semantic_index::SymbolTable` (#17172) [red-knot] Fix `str(…)` calls (#17163) [red-knot] visibility_constraint analysis for match cases (#17077) [red-knot] Fix playground crashes when diagnostics are stale (#17165) [red-knot] Callable types are disjoint from literals (#17160) [red-knot] Fix inference for `pow` between two literal integers (#17161) [red-knot] Add GitHub PR annotations when mdtests fail in CI (#17150) [red-knot] Fix equivalence of differently ordered unions that contain `Callable` types (#17145) [red-knot] Add initial set of tests for unreachable code (#17159) [`airflow`] Move `AIR302` to `AIR301` and `AIR303` to `AIR302` (#17151) ruff_db: simplify lifetimes on `DiagnosticDisplay` [red-knot] Detect division-by-zero in unions and intersections (#17157) [`airflow`] Add autofix infrastructure to `AIR302` name checks (#16965) [`flake8-bandit`] Mark `str` and `list[str]` literals as trusted input (`S603`) (#17136) [`airflow`] Add autofix for `AIR302` attribute checks (#16977) [`airflow`] Extend `AIR302` with additional symbols (#17085) ...
maxmynter
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…l-sh#17157) ## Summary With this PR, we emit a diagnostic for this case where previously didn't: ```py from typing import Literal def f(m: int, n: Literal[-1, 0, 1]): # error: [division-by-zero] "Cannot divide object of type `int` by zero" return m / n ``` ## Test Plan New Markdown test
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Summary
Yet another instance of "we should have handled unions and intersections correctly". With this PR, we emit a diagnostic for this case where previously didn't:
The new Boolean flag is not pretty, but without it, we emit multiple diagnostics for a single expression in some cases. Let me know if you have better ways to address this.
Test Plan
New Markdown test