[ty] Fix out-of-order semantic token for function with regular argument after kwargs #21013
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Diagnostic diff on typing conformance testsNo changes detected when running ty on typing conformance tests ✅ |
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dcreager
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Oct 22, 2025
* main: (65 commits) [ty] Some more simplifications when rendering constraint sets (#21009) [ty] Make `attributes.md` mdtests faster (#21030) [ty] Set `INSTA_FORCE_PASS` and `INSTA_OUTPUT` environment variables from mdtest.py (#21029) [ty] Fall back to `Divergent` for deeply nested specializations (#20988) [`ruff`] Autogenerate TypeParam nodes (#21028) [ty] Add assertions to ensure that we never call `KnownClass::Tuple.to_instance()` or similar (#21027) [`ruff`] Auto generate ast Pattern nodes (#21024) [`flake8-simplify`] Skip `SIM911` when unknown arguments are present (#20697) Render a diagnostic for syntax errors introduced in formatter tests (#21021) [ty] Support goto-definition on vendored typeshed stubs (#21020) [ty] Implement go-to for binary and unary operators (#21001) [ty] Avoid ever-growing default types (#20991) [syntax-errors] Name is parameter and global (#20426) [ty] Disable panicking mdtest (#21016) [ty] Fix completions at end of file (#20993) [ty] Fix out-of-order semantic token for function with regular argument after kwargs (#21013) [ty] Fix auto import for files with `from __future__` import (#20987) [`fastapi`] Handle ellipsis defaults in FAST002 autofix (`FAST002`) (#20810) [`ruff`] Skip autofix for keyword and `__debug__` path params (#20960) [`flake8-bugbear`] Skip `B905` and `B912` if <2 iterables and no starred arguments (#20998) ...
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Summary
Fixes a bug where the semantic token provider returned out-of-order tokens for
function definitions with a regular parameter coming after a kwargs parameter:
The LSP specification isn't explicit whether out-of-order tokens are allowed, but
the way it reads suggests that providers are expected to return tokens in-order.
The root cause for this issue is that
Parameters::iter()only guarantees toreturn the parameters in source order if there are no syntax errors because of how
parameters are represented internally (different vectors for the different parameter kinds).
The ideal fix would be to change our
Parametersdefinition but that's a bit more work,which is why I decided to sort the parameters in place instead.
Fixes astral-sh/ty#1406
Test Plan
Added test