astral-sh/ty 0.0.1-alpha.35

on GitHub

Release Notes

Released on 2025-12-16.

Bug fixes

• Fix panic for stringified comprehensions and boolean expressions in type expression (#21967)
• Avoid stack overflow when determining inferable typevars (#21971)
• Fix false-positive invalid-method-override diagnostic on method that uses Callable with a ParamSpec (#21934)
• Disallow explicit specialization of type variables themselves (#21938)
• Fix hover type on named expression ("walrus expression") targets (#21952)

LSP server

• Add "qualify ..." code fix for undefined references (#21968)
• Add new goto-definition targets on inlay hints (#21950)
• Remove invalid statement-keyword completions in for-statements (#21979)

Core type checking

• Add support for __qualname__ and other implicit class attributes (#21966)
• Emit a diagnostic when a frozen dataclass inherits a non-frozen dataclass and vice versa (#21962)
• Emit a diagnostic when a type variable with a default is followed by one without a default (#21787)
• Improve diagnostics for unsupported binary operations and unsupported augmented assignments (#21947)
• Improve check enforcing that an overloaded function must have an implementation (#21978)
• Use unqualified names for displays of TypeAliasTypes and unbound ParamSpecs/TypeVars (#21960)

Performance

• Speed up ty on Linux by using jemalloc (#21975)

Contributors

• @11happy
• @dhruvmanila
• @AlexWaygood
• @mtshiba
• @MichaReiser
• @Gankra
• @silamon
• @dcreager
• @charliermarsh
• @RasmusNygren
• @carljm

Install ty 0.0.1-alpha.35

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.35/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.35/ty-installer.ps1 | iex"

Download ty 0.0.1-alpha.35