0.747

✈️ !!!

Analysis

• Avoid stack overflow in degenerate unions and intersection types
• Fix a bug where analysis would permit iteration over non-iterable types in certain circumstances:

local function foo(t: boolean | number | vector | {})
    -- This used to be erroneously permitted
    for i, v in t do
    end
end

• Fix an ICE in certain scenarios involving global function definitions within type functions
• Fix an issue where error suppression was too eager to fire. eg

-- The error here used to be improperly suppressed.
local _: { read [number]: "hello" } = ... :: { read [any]: string }

Runtime

• Add luau_loadlazy: This function is the same as luau_load, but only the main function is built. Other functions are lazy stubs that are loaded on their first use.
• Do not use removed collapsed phis in BytecodeGraphParser
• Fix #3082
• Implement buffer.readvector*f32 and buffer.writevector*f32 per luau-lang/rfcs#198
• Clip all in-progress integer code. See luau-lang/rfcs#269 for details

Native Codegen

• Add support accelerated direct userdata access
• Add support for frozen metatable cache access
• Improved runtime rebuild error handling and a loop trip fix
• Exit sync restore for expected tags
• Runtime rebuild log and result callbacks
• Lower thresholds before promotion to native code
• Add a runtime rebuild log and result callbacks to better track VM promotion.
• Fix register array overflow in LOP_FASTCALL bytecode analysis
• Perform store forwarding for split stores as well

Classes (experimental)

• Report an error if a class's base constructor isn't called before a read or write to self in its constructor
• Add support for nested and local classes

Co-authored-by: Andy Friesen afriesen@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: Thomas Schollenberger tschollenberger@roblox.com
Co-authored-by: Vyacheslav Egorov vegorov@roblox.com