`:map` with default key merged with `[:map {:closed true}]` results in virtually open map

[jahson]

I'm not really sure at the moment about what is correct behavior in this case, but resulting map is closed and thus should, probably, remove default key?

(def registry (merge (m/default-schemas) (mu/schemas)))
  (def Merged
    (m/schema
     [:merge
      [:map
       [:x :string]
       [::m/default [:map-of :keyword :any]]]
      [:map {:closed true}
       [:y :int]]]
     {:registry registry}))

  (m/validate Merged {:x "kikka", :y 6, :z "invalid"})
; => true

Seems to be related to https://github.com/metosin/malli/pull/871

[ikitommi]

Good point. Result of merge:

(m/deref Merged)
;[:map {:closed true} 
; [:x :string] 
; [:y :int]
; [:malli.core/default [:map-of :keyword :any]]]