0.674 General

Expose an optional get_alias API as an alternative to get_config in Luau.Require and Luau.RequireNavigator.
Improve the Luau CLI's virtual filesystem implementation to fix bugs related to init.luau. Fixes #1816

New Type Solver

Avoid double reporting errors when erroneous arguments are provided to type functions.
Fix some instances of unresovable cyclic type functions in loops by only considering the first loop cycles. This results in some type inference inaccuracies when the type of a variable in loop through multiple iterations. Fixes #1413.
Better generalize free types that have meaningful lower and upper bounds, especially for table indexers.
Report more specific errors when assigning or returning table literal types, instead of citing the entire table type.
Inference for functions with generic type packs is greatly improved.
Fix some internal compiler exceptions when using type-stating functions like table.freeze in if _ then _ else _ expressions and short circuiting binary operations.
More consistently simplify unions of primitive types, especially in array-like and dictionary-like tables.

Fix a crash when type checking an erroneous type alias containing typeof with a type assertion expression, as in:

type MyTable = {}
-- This will error at type checking time as it's a duplicate
type MyTable = typeof(setmetatable(SomeTable :: {}, SomeMetaTable));

Fix a crash when inferring the type of an index expression where the indexee is invalid (e.g. nil).

Avoid throwing an exception from luau_load if we run out of memory.
Type functions are no longer compiled and included in bytecode. Fixes #1817.
Fix some instances of Luau C API functions reading invalid debug information (generally when the first or last instruction of a block was being inspected). Fixes #1369.
Avoid potential signed integer overflow when doing bounds checks on tables.
Support 16 byte aligned userdata objects when system allocation alignment is also 16 bytes.
Fix memory leaks in Luau.Require when using VM build with no exceptions. Fixes #1827.

Co-authored-by: Andy Friesen afriesen@roblox.com
Co-authored-by: Ariel Weiss aaronweiss@roblox.com
Co-authored-by: Hunter Goldstein hgoldstein@roblox.com
Co-authored-by: James McNellis jmcnellis@roblox.com
Co-authored-by: Sora Kanosue skanosue@roblox.com
Co-authored-by: Talha Pathan tpathan@roblox.com
Co-authored-by: Varun Saini vsaini@roblox.com
Co-authored-by: Vyacheslav Egorov vegorov@roblox.com