`strict world age semantics for global bindings` warnings, not sure if warranted

[nsajko]

On master this simple type alias definition produces a warning:

julia> abstract type A{S, T} end

julia> @eval begin
           A1{S} = A{S, 1}
           const A2 = A1
       end
WARNING: Detected access to binding `Main.A1` in a world prior to its definition world.
  Julia 1.12 has introduced more strict world age semantics for global bindings.
  !!! This code may malfunction under Revise.
  !!! This code will error in future versions of Julia.
Hint: Add an appropriate `invokelatest` around the access to this binding.
A{S, 1} where S

However, using a different syntax for the type alias doesn't result in a warning:

julia> abstract type A{S, T} end

julia> @eval begin
           const A1 = A{S, 1} where {S}
           const A2 = A1
       end
A{S, 1} where S

Affects FillArrays.jl: JuliaArrays/FillArrays.jl#402

@Keno

[Keno]

No, it's a lowering bug where it's not inserting the world age increment for the typealias, which is a bit of a syntax corner case