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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
..
conformance Sync to upstream/release/677 (#1872) 2025-06-06 11:52:47 -07:00
require Sync to upstream/release/674 (#1832) 2025-05-16 12:39:58 -07:00
AssemblyBuilderA64.test.cpp Sync to upstream/release/670 (#1779) 2025-04-18 13:44:39 -07:00
AssemblyBuilderX64.test.cpp Sync to upstream/release/670 (#1779) 2025-04-18 13:44:39 -07:00
AstJsonEncoder.test.cpp Sync to upstream/release/676 (#1856) 2025-05-30 11:17:49 -07:00
AstQuery.test.cpp Sync to upstream/release/657 (#1619) 2025-01-17 14:55:39 -08:00
AstQueryDsl.cpp Sync to upstream/release/549 (#707) 2022-10-14 12:48:41 -07:00
AstQueryDsl.h Sync to upstream/release/549 (#707) 2022-10-14 12:48:41 -07:00
AstVisitor.test.cpp Sync to upstream/release/501 (#20) 2021-11-01 14:52:34 -07:00
Autocomplete.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
BuiltinDefinitions.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
ClassFixture.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
ClassFixture.h Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
CodeAllocator.test.cpp Enable the A64 unwinding test (#1769) 2025-04-11 11:33:06 -07:00
Compiler.test.cpp Sync to upstream/release/674 (#1832) 2025-05-16 12:39:58 -07:00
Config.test.cpp Sync to upstream/release/651 (#1513) 2024-11-08 13:41:45 -08:00
Conformance.test.cpp Sync to upstream/release/677 (#1872) 2025-06-06 11:52:47 -07:00
ConformanceIrHooks.h Sync to upstream/release/637 (#1354) 2024-08-02 07:30:04 -07:00
ConstraintGeneratorFixture.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
ConstraintGeneratorFixture.h Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
ConstraintSolver.test.cpp Sync to upstream/release/641 (#1382) 2024-08-30 13:16:51 -07:00
CostModel.test.cpp Sync to upstream/release/591 (#1012) 2023-08-18 11:15:41 -07:00
DataFlowGraph.test.cpp Sync to upstream/release/676 (#1856) 2025-05-30 11:17:49 -07:00
DenseHash.test.cpp Sync to upstream/release/561 (#820) 2023-01-27 14:28:31 -08:00
EqSat.language.test.cpp Sync to upstream/release/651 (#1513) 2024-11-08 13:41:45 -08:00
EqSat.propositional.test.cpp Sync to upstream/release/637 (#1354) 2024-08-02 07:30:04 -07:00
EqSat.slice.test.cpp Equality graphs (#1285) 2024-07-16 10:35:20 -07:00
EqSatSimplification.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Error.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Fixture.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Fixture.h Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
FragmentAutocomplete.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Frontend.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Generalization.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
InferPolarity.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
InsertionOrderedMap.test.cpp Sync to upstream/release/580 (#951) 2023-06-09 10:08:00 -07:00
Instantiation2.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
IostreamOptional.h Sync to upstream/release/603 (#1097) 2023-11-10 13:10:07 -08:00
IrBuilder.test.cpp Sync to upstream/release/659 (#1637) 2025-01-31 18:58:36 -08:00
IrCallWrapperX64.test.cpp Sync to upstream/release/601 (#1084) 2023-10-27 14:18:41 -07:00
IrLowering.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
IrRegAllocX64.test.cpp Sync to upstream/release/595 (#1044) 2023-09-15 10:26:59 -07:00
JsonEmitter.test.cpp Sync to upstream/release/543 (#657) 2022-09-01 16:14:03 -07:00
Lexer.test.cpp Sync to upstream/release/666 (#1747) 2025-03-21 14:43:00 -07:00
Linter.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
LValue.test.cpp Sync to upstream/release/637 (#1354) 2024-08-02 07:30:04 -07:00
main.cpp Sync to upstream/release/657 (#1619) 2025-01-17 14:55:39 -08:00
Module.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
NonstrictMode.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
NonStrictTypeChecker.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Normalize.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
NotNull.test.cpp Sync to upstream/release/555 (#768) 2022-12-02 10:09:59 -08:00
Parser.test.cpp Sync to upstream/release/676 (#1856) 2025-05-30 11:17:49 -07:00
RegisterCallbacks.cpp Sync to upstream/release/594 (#1036) 2023-09-07 17:13:49 -07:00
RegisterCallbacks.h Sync to upstream/release/594 (#1036) 2023-09-07 17:13:49 -07:00
Repl.test.cpp Sync to upstream/release/656 (#1612) 2025-01-10 11:34:39 -08:00
RequireByString.test.cpp Sync to upstream/release/674 (#1832) 2025-05-16 12:39:58 -07:00
RequireTracer.test.cpp Sync to upstream/release/671 (#1787) 2025-04-25 14:19:27 -07:00
RuntimeLimits.test.cpp Sync to upstream/release/650 (#1502) 2024-11-01 12:06:07 -07:00
ScopedFlags.h Sync to upstream/release/667 (#1754) 2025-03-28 16:15:46 -07:00
Set.test.cpp Sync to upstream/release/625 (#1252) 2024-05-10 11:21:45 -07:00
SharedCodeAllocator.test.cpp Sync to upstream/release/647 (#1469) 2024-10-11 17:48:30 -07:00
Simplify.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
StringUtils.test.cpp Sync to upstream/release/588 (#992) 2023-07-28 08:13:53 -07:00
Subtyping.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Symbol.test.cpp Sync to upstream/release/641 (#1382) 2024-08-30 13:16:51 -07:00
ToDot.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TopoSort.test.cpp Sync to upstream/release/671 (#1787) 2025-04-25 14:19:27 -07:00
ToString.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Transpiler.test.cpp Sync to upstream/release/675 (#1845) 2025-05-27 14:24:46 -07:00
TxnLog.test.cpp Sync to upstream/release/663 (#1699) 2025-02-28 14:42:30 -08:00
TypeFunction.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeFunction.user.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.aliases.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.annotations.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.anyerror.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.builtins.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.cfa.test.cpp Sync to upstream/release/636 (#1346) 2024-07-26 10:47:49 -07:00
TypeInfer.classes.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.definitions.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.functions.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.generics.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.intersectionTypes.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.loops.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.modules.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.negations.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.oop.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.operators.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.primitives.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.provisional.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.refinements.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.singletons.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.tables.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.tryUnify.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.typePacks.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.typestates.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.unionTypes.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeInfer.unknownnever.test.cpp Sync to upstream/release/677 (#1872) 2025-06-06 11:52:47 -07:00
TypePack.test.cpp Sync to upstream/release/653 (#1541) 2024-11-22 13:00:51 -08:00
TypePath.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
TypeVar.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00
Unifier2.test.cpp Sync to upstream/release/641 (#1382) 2024-08-30 13:16:51 -07:00
Variant.test.cpp Sync to upstream/release/637 (#1354) 2024-08-02 07:30:04 -07:00
VecDeque.test.cpp Sync to upstream/release/637 (#1354) 2024-08-02 07:30:04 -07:00
VisitType.test.cpp Sync to upstream/release/678 (#1878) 2025-06-13 09:36:35 -07:00