Steps 4-6 of ForIn/OfBodyEvaluation define the hint variable, which is intended to be passed to the InitializeReferencedBinding AO on steps 9.h.vii.5-6. This is necessary to correctly initialize a resource that uses Symbol.asyncDispose in the following statement:

for (await using x of y) {
}

The steps 9.h.vii.5-6 are currently

5. If IsUsingDeclaration of lhs is true, then
   1. Let status be Completion(InitializeReferencedBinding(lhsRef, nextValue, sync-dispose)).
6. Else,
   1. Let status be Completion(InitializeReferencedBinding(lhsRef, nextValue, normal)).

but should be

5. Let status be Completion(InitializeReferencedBinding(lhsRef, nextValue, hint)).