MethodError does not display worldage hint when kwargs are involved

[Keno]

(Using opaque closure to easily get a captured world age, but happens with any other world age capture mechanism also)

This is expected:

julia> using Base.Experimental: @opaque

julia> global callback = (args...)->nothing
#1 (generic function with 1 method)

julia> f = @opaque ()->callback()
()::Any->◌

julia> f()

julia> callback = (args...)->nothing
#4 (generic function with 1 method)

julia> f()
ERROR: MethodError: no method matching (::var"#4#5")()
The applicable method may be too new: running in world age 30972, while current world is 30973.

Closest candidates are:
  (::var"#4#5")(::Any...) (method too new to be called from this world context.)
   @ Main REPL[5]:1

This is missing the world age hint in the errorshow:

julia> using Base.Experimental: @opaque

julia> global callback = (args...; kwargs...)->nothing
#1 (generic function with 1 method)

julia> f = @opaque ()->callback(;a=1)
()::Any->◌

julia> f()

julia> callback = (args...; kwargs...)->nothing
#5 (generic function with 1 method)

julia> f()
ERROR: MethodError: no method matching (::var"#5#7")(; a::Int64)

Closest candidates are:
  (::var"#5#7")(::Any...; kwargs...)
   @ Main REPL[5]:1

Stacktrace:
 [1] (::Tuple{})()
   @ Main ./REPL[3]:1
 [2] top-level scope
   @ REPL[6]:1

[Keno]

Also the ::Any... in the closets candidates is shown in red in both cases, which is wrong.