ruff/crates/ty_python_semantic/resources
Carl Meyer 0138cd238a
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[ty] avoid fixpoint unioning of types containing current-cycle Divergent (#21910)
Partially addresses https://github.com/astral-sh/ty/issues/1732

## Summary

Don't union the previous type in fixpoint iteration if the previous type
contains a `Divergent` from the current cycle and the latest type does
not. The theory here, as outlined by @mtshiba at
https://github.com/astral-sh/ty/issues/1732#issuecomment-3609937420, is
that oscillation can't occur by removing and then reintroducing a
`Divergent` type repeatedly, since `Divergent` types are only introduced
at the start of fixpoint iteration.

## Test Plan

Removes a `Divergent` type from the added mdtest, doesn't otherwise
regress any tests.
2025-12-11 19:52:34 -08:00
..
corpus [ty] improve bad specialization results & error messages (#21840) 2025-12-11 19:21:34 -08:00
mdtest [ty] avoid fixpoint unioning of types containing current-cycle Divergent (#21910) 2025-12-11 19:52:34 -08:00
primer [ty] Add missing projects to good.txt (#21721) 2025-12-01 11:18:41 +01:00
README.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00

Markdown files within the mdtest/ subdirectory are tests of type inference and type checking; executed by the tests/mdtest.rs integration test.

See crates/ty_test/README.md for documentation of this test format.