Release 0.689

General Improvements

• Fix a crash that could occur when the deprecated attribute is used in a syntactically incorrect way.
• Improve stack utilization in the parser. This should make it harder for deeply nested constructs to exhaust the C stack.
• Fixed the xpcall continuation to handle errors handling the same way as main execution path.
• The fuzzer now enables all Luau flags..
• The fuzzer will now add attributes and create table literal expressions.
• The type of rawget is now <K, V>(tab: {[K]: V}, k: K) -> V? to reflect the fact that it returns nil when the key is not present.
• Implement native codegen lowering for vector.lerp

Autocomplete

• Autocomplete will also now suggest hot comments like --!strict and --!optimize
• Incremental autocomplete had a bug where it wasn't selecting the correct refinement of the autocomplete subject. This is now fixed.

New Solver

• Fix an incorrect refinement that caused autocomplete to fail on statements of the following form: if #some_local.
• Improve the error feedback when a type function is not passed required arguments. (ie no <> afterward at all)
• Improvements to bidirectional table inference

Internal Contributors

Co-authored-by: Andy Friesen afriesen@roblox.com
Co-authored-by: Annie Tang annietang@roblox.com
Co-authored-by: Hunter Goldstein hgoldstein@roblox.com
Co-authored-by: Ilya Rezvov irezvov@roblox.com
Co-authored-by: Sora Kanosue skanosue@roblox.com
Co-authored-by: Varun Saini vsaini@roblox.com
Co-authored-by: Vighnesh Vijay vvijay@roblox.com
Co-authored-by: Vyacheslav Egorov vegorov@roblox.com

Full Changelog: 0.688...0.689