Fix definition module name & location (#1495)

Closes #1441 

Brings behavior to parity with the old solver by filling in
definitionLocation and definitionModuleName for Luau-consuming
programs/libraries to use.

Analysis/src/ConstraintGenerator.cpp

@@ -34,6 +34,7 @@ LUAU_DYNAMIC_FASTINT(LuauTypeSolverRelease)
 LUAU_FASTFLAG(LuauTypestateBuiltins2)
 
 LUAU_FASTFLAGVARIABLE(LuauNewSolverVisitErrorExprLvalues)
+LUAU_FASTFLAGVARIABLE(LuauNewSolverPopulateTableLocations)
 
 namespace Luau
 {
@@ -2844,6 +2845,10 @@ Inference ConstraintGenerator::check(const ScopePtr& scope, AstExprTable* expr,
 
     ttv->state = TableState::Unsealed;
     ttv->definitionModuleName = module->name;
+    if (FFlag::LuauNewSolverPopulateTableLocations)
+    {
+        ttv->definitionLocation = expr->location;
+    }
     ttv->scope = scope.get();
 
     interiorTypes.back().push_back(ty);
@@ -3301,7 +3306,16 @@ TypeId ConstraintGenerator::resolveTableType(const ScopePtr& scope, AstType* ty,
             ice->ice("Unexpected property access " + std::to_string(int(astIndexer->access)));
     }
 
-    return arena->addType(TableType{props, indexer, scope->level, scope.get(), TableState::Sealed});
+    TypeId tableTy = arena->addType(TableType{props, indexer, scope->level, scope.get(), TableState::Sealed});
+    TableType* ttv = getMutable<TableType>(tableTy);
+
+    if (FFlag::LuauNewSolverPopulateTableLocations)
+    {
+        ttv->definitionModuleName = module->name;
+        ttv->definitionLocation = tab->location;
+    }
+
+    return tableTy;
 }
 
 TypeId ConstraintGenerator::resolveFunctionType(

Analysis/src/ConstraintSolver.cpp

@@ -33,6 +33,7 @@ LUAU_FASTFLAGVARIABLE(DebugLuauLogBindings)
 LUAU_FASTINTVARIABLE(LuauSolverRecursionLimit, 500)
 LUAU_DYNAMIC_FASTINT(LuauTypeSolverRelease)
 LUAU_FASTFLAGVARIABLE(LuauRemoveNotAnyHack)
+LUAU_FASTFLAG(LuauNewSolverPopulateTableLocations)
 
 namespace Luau
 {
@@ -1108,10 +1109,15 @@ bool ConstraintSolver::tryDispatch(const TypeAliasExpansionConstraint& c, NotNul
 
             target = follow(instantiated);
         }
+        else if (FFlag::LuauNewSolverPopulateTableLocations)
+        {
+            // This is a new type - redefine the location.
+            ttv->definitionLocation = constraint->location;
+            ttv->definitionModuleName = currentModuleName;
+        }
 
         ttv->instantiatedTypeParams = typeArguments;
         ttv->instantiatedTypePackParams = packArguments;
-        // TODO: Fill in definitionModuleName.
     }
 
     bindResult(target);
@@ -1433,7 +1439,8 @@ bool ConstraintSolver::tryDispatch(const FunctionCheckConstraint& c, NotNull<con
                 }
             }
         }
-        else if (expr->is<AstExprConstantBool>() || expr->is<AstExprConstantString>() || expr->is<AstExprConstantNumber>() || expr->is<AstExprConstantNil>())
+        else if (expr->is<AstExprConstantBool>() || expr->is<AstExprConstantString>() || expr->is<AstExprConstantNumber>() ||
+                 expr->is<AstExprConstantNil>())
         {
             Unifier2 u2{arena, builtinTypes, constraint->scope, NotNull{&iceReporter}};
             u2.unify(actualArgTy, expectedArgTy);
@@ -2326,12 +2333,7 @@ bool ConstraintSolver::tryDispatchIterableTable(TypeId iteratorTy, const Iterabl
     return true;
 }
 
-bool ConstraintSolver::tryDispatchIterableFunction(
+bool ConstraintSolver::tryDispatchIterableFunction(TypeId nextTy, TypeId tableTy, const IterableConstraint& c, NotNull<const Constraint> constraint)
-    TypeId nextTy,
-    TypeId tableTy,
-    const IterableConstraint& c,
-    NotNull<const Constraint> constraint
-)
 {
     const FunctionType* nextFn = get<FunctionType>(nextTy);
     // If this does not hold, we should've never called `tryDispatchIterableFunction` in the first place.

tests/TypeInfer.modules.test.cpp

@@ -14,6 +14,7 @@ LUAU_FASTFLAG(LuauInstantiateInSubtyping)
 LUAU_FASTFLAG(LuauRequireCyclesDontAlwaysReturnAny)
 LUAU_FASTFLAG(LuauSolverV2)
 LUAU_FASTFLAG(LuauTypestateBuiltins2)
+LUAU_FASTFLAG(LuauNewSolverPopulateTableLocations)
 
 using namespace Luau;
 
@@ -466,7 +467,15 @@ local b: B.T = a
     LUAU_REQUIRE_ERROR_COUNT(1, result);
 
     if (FFlag::LuauSolverV2)
-        CHECK(toString(result.errors.at(0)) == "Type 'T' could not be converted into 'T'; at [read \"x\"], number is not exactly string");
+    {
+        if (FFlag::LuauNewSolverPopulateTableLocations)
+            CHECK(
+                toString(result.errors.at(0)) ==
+                "Type 'T' from 'game/A' could not be converted into 'T' from 'game/B'; at [read \"x\"], number is not exactly string"
+            );
+        else
+            CHECK(toString(result.errors.at(0)) == "Type 'T' could not be converted into 'T'; at [read \"x\"], number is not exactly string");
+    }
     else
     {
         const std::string expected = R"(Type 'T' from 'game/A' could not be converted into 'T' from 'game/B'
@@ -507,7 +516,15 @@ local b: B.T = a
     LUAU_REQUIRE_ERROR_COUNT(1, result);
 
     if (FFlag::LuauSolverV2)
-        CHECK(toString(result.errors.at(0)) == "Type 'T' could not be converted into 'T'; at [read \"x\"], number is not exactly string");
+    {
+        if (FFlag::LuauNewSolverPopulateTableLocations)
+            CHECK(
+                toString(result.errors.at(0)) ==
+                "Type 'T' from 'game/B' could not be converted into 'T' from 'game/C'; at [read \"x\"], number is not exactly string"
+            );
+        else
+            CHECK(toString(result.errors.at(0)) == "Type 'T' could not be converted into 'T'; at [read \"x\"], number is not exactly string");
+    }
     else
     {
         const std::string expected = R"(Type 'T' from 'game/B' could not be converted into 'T' from 'game/C'