Simple Tagging inference failure

[shashi]

A no-op context with tagging causes ()->1+2 to not infer.

using Cassette
import Cassette: enabletagging, disablehooks, tag

Cassette.@context DC

function drun(f, x...)
    ctx = disablehooks(enabletagging(DC(), f))
    Cassette.overdub(ctx, f, x...)
end

#=
julia> @code_warntype drun(()->1+2)
Variables
  #self#::Core.Compiler.Const(drun, false)
  f::Core.Compiler.Const(var"#10#11"(), false)
  x::Tuple{}
  ctx::Cassette.Context{nametype(DC),Nothing,Cassette.Tag{nametype(DC),0xd14e46825b5d9a56,Nothing},Cassette.var"##PassType#404",IdDict{Module,Dict{Symbol,Cassette.BindingMeta}},Cassette.DisableHooks}

Body::Any
1 ─ %1 = Main.DC()::Core.Compiler.Const(Cassette.Context{nametype(DC),Nothing,Nothing,Cassette.var"##PassType#404",Nothing,Nothing}(nametype(DC)(), nothing, nothing, Cassette.var"##PassType#404"(), nothing, nothing), false)
│   %2 = Main.enabletagging(%1, f)::Cassette.Context{nametype(DC),Nothing,Cassette.Tag{nametype(DC),0xd14e46825b5d9a56,Nothing},Cassette.var"##PassType#404",IdDict{Module,Dict{Symbol,Cassette.BindingMeta}},Nothing}
│        (ctx = Main.disablehooks(%2))
│   %4 = Cassette.overdub::Core.Compiler.Const(Cassette.overdub, false)
│   %5 = Core.tuple(ctx, f)::Core.Compiler.PartialStruct(Tuple{Cassette.Context{nametype(DC),Nothing,Cassette.Tag{nametype(DC),0xd14e46825b5d9a56,Nothing},Cassette.var"##PassType#404",IdDict{Module,Dict{Symbol,Cassette.BindingMeta}},Cassette.DisableHooks},var"#10#11"}, Any[Cassette.Context{nametype(DC),Nothing,Cassette.Tag{nametype(DC),0xd14e46825b5d9a56,Nothing},Cassette.var"##PassType#404",IdDict{Module,Dict{Symbol,Cassette.BindingMeta}},Cassette.DisableHooks}, Core.Compiler.Const(var"#10#11"(), false)])
│   %6 = Core._apply(%4, %5, x)::Any
└──      return %6
=#

It would be to nice to get tagging to be fast. This would be a first step.