Andy Friesen 713ee2ff8b Sync to upstream/release/678 (#1878) ... # What's Changed? We've been hard at work fixing bugs in the new type solver and getting it ready to go! ## Native Codegen * Specialized Luau Codegen instruction for fetching an import. As a reminder, an import is an expression like `global.thing` and covers stuff like libraries without fastcalls `coroutine.resume`) and atomic extern libraries. ## New Type Solver * Fix an issue that prevented eager generalization from working properly with OO styled code. * Avoid copying uninitialized memory in Luau attribute parsing * Improve type inference of unsealed tables. * This fixes https://github.com/luau-lang/luau/issues/1838 * and https://github.com/luau-lang/luau/issues/1859 * Infer potential singleton string keys in autocomplete when the expected index type is a union type. * Avoid creating cyclic types when reducing types of the form `t1 where t1 = refine<T, t1, Y>` * The type cloner now does the same thing for the new and old solvers. * Properly infer polarity (aka variance) for divergent table properties. (ie tables whose read type and write type are not the same) * Crash fixes. --------- Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Varun Saini <61795485+vrn-sn@users.noreply.github.com> Co-authored-by: Alexander Youngblood <ayoungblood@roblox.com> Co-authored-by: Menarul Alam <malam@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com> Co-authored-by: Vighnesh <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com>		2025-06-13 09:36:35 -07:00
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include/Luau	Sync to upstream/release/678 (#1878)	2025-06-13 09:36:35 -07:00
src	Sync to upstream/release/678 (#1878)	2025-06-13 09:36:35 -07:00