chore(deps): update dependency ty to v0.0.43

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ty (changelog)	==0.0.42 → ==0.0.43

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Release Notes

astral-sh/ty (ty)

v0.0.43

Compare Source

Released on 2026-06-03.

Bug fixes

• Don't inject Unknown from non-callable elements of intersection call (#​25538)
• Don't needlessly disambiguate the same type alias (#​25563)
• Fix variance inference for nested type aliases (#​25567)
• Ignore rejected member annotations for synthesized bindings (#​25427)
• Normalize dynamic class literals in cycle recovery (#​25558)
• Register file roots for first-party search paths (#​25522)
• Treat union-bound typevars like unions for possibly-missing-attribute (#​25561)

LSP server

• Suppress importable completions that are already in scope (#​25479)

Performance

• Avoid retaining duplicate function signatures (#​25609)
• Compact retained definition inference results (#​25593)
• Compact retained definition kinds (#​25610)
• Compact retained definitions by node (#​25498)
• Consolidate AST ID reverse lookup (#​25455)
• Consolidate retained use-def definition maps (#​25499)
• Omit redundant definitions-by-node entries (#​25501)
• Reuse common protocol constraints for TypedDict unions (#​25598)

Diagnostics

• Improve error context for not-iterable diagnostics (#​24944)

Core type checking

• Detect disjointness due to incompatible generic specializations (#​24822)
• Distinguish typing.Callable from collections.abc.Callable (#​24954)
• Include nested global/nonlocal bindings in type inference (#​25387)
• Optional lower/upper bounds in individual constraints (#​25435)
• Preserve slice-bound types in subscript inference (#​25446)
• Reject Self in type aliases (#​25529)
• Require literal booleans for TypedDict flags (#​25594)
• Support narrowing on lengths (#​25347)
• Synthesize precise __len__ methods for literals (#​25600)
• Use callable type context to implicitly specialize generic class (#​25471)
• expand type aliases inside type context unions (#​25553)

Contributors

• @​carljm
• @​cheparity
• @​kouhe3
• @​sharkdp
• @​charliermarsh
• @​dcreager
• @​thejchap
• @​oconnor663

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📚 Documentation preview 📚: https://objctypes--564.org.readthedocs.build/en/564/