luau 0.663

[BrewTestBot]

Created by brew bump

---

Created with brew bump-formula-pr.

Details

release notes

## What's Changed
Hey folks, another week means another Luau release! This one features a number of bug fixes in the New Type Solver including improvements to user-defined type functions and a bunch of work to untangle some of the outstanding issues we've been seeing with constraint solving not completing in real world use. We're also continuing to make progress on crashes and other problems that affect the stability of fragment autocomplete, as we work towards delivering consistent, low-latency autocomplete for any editor environment.

Chore: update applicable .lua files to .luau by @Ramdoys in chore: update applicable .lua files to .luau luau-lang/luau#1560

New Type Solver

Fix a bug in user-defined type functions where print would incorrectly insert \1 a number of times.
Fix a bug where attempting to refine an optional generic with a type test will cause a false positive type error (fixes #1666)
Fix a bug where the refine type family would not skip over *no-refine* discriminants (partial resolution for #1424)
Fix a constraint solving bug where recursive function calls would consistently produce cyclic constraints leading to incomplete or inaccurate type inference.
Implement readparent and writeparent for class types in user-defined type functions, replacing the incorrectly included parent method.
Add initial groundwork (under a debug flag) for eager free type generalization, moving us towards further improvements to constraint solving incomplete errors.

Fragment Autocomplete

Ease up some assertions to improve stability of mixed-mode use of the two type solvers (i.e. using Fragment Autocomplete on a type graph originally produced by the old type solver)
Resolve a bug with type compatibility checks causing internal compiler errors in autocomplete.

Lexer and Parser

Improve the accuracy of the roundtrippable AST parsing mode by correctly placing closing parentheses on type groupings.
Add a getter for offset in the Lexer by @aduermael in #1688
Add a second entry point to the parser to parse an expression, parseExpr

New Contributors

@aduermael made their first contribution in Lexer: add offset getter luau-lang/luau#1688

Full Changelog: luau-lang/luau@0.662...0.663
Internal Contributors
Co-authored-by: Andy Friesen afriesen@roblox.com

Co-authored-by: Ariel Weiss aaronweiss@roblox.com

Co-authored-by: Aviral Goel agoel@roblox.com

Co-authored-by: Hunter Goldstein hgoldstein@roblox.com

Co-authored-by: James McNellis jmcnellis@roblox.com

Co-authored-by: Talha Pathan tpathan@roblox.com

Co-authored-by: Vighnesh Vijay vvijay@roblox.com

Co-authored-by: Vyacheslav Egorov vegorov@roblox.com

[github-actions]

🤖 An automated task has requested bottles to be published to this PR.