Staged (`@generated`) functions expand macros w.r.t. incorrect world

[topolarity]

julia> module Generated
           macro bar()
               return :(1)
           end
           @generated function foo(x::T) where T
               return :(println("@bar: ", @bar, " (", $T, ")"))
           end
           foo(1)
           macro bar()
               return :(2)
           end
           foo(1)
           foo(1.0)
       end
@bar: 1 (Int64)
@bar: 1 (Int64)
@bar: 2 (Float64)

The @bar macro should have been expanded in the definition world of foo, but it is instead expanded in the latest world at compilation time.