When parsing, the parsed value is passed into validation functions, causing failure to parse even on schemas that validate.

[escherize]

It seems like this is not the intended behavior, but here's what I am seeing locally:

These print different things, but that's not a big problem:

(mc/validate [:and [:catn ["a" :int] ["b" :keyword]]
              [:fn (fn [x] (prn x) true)]]
             [3 :x])
;; prints: [3 :x]
;; => true

(mc/parse [:and [:catn ["a" :int] ["b" :keyword]]
           [:fn (fn [x] (prn x) true)]]
          [3 :x])
;; prints: {"a" 3, "b" :x}
;; => {"a" 3, "b" :x}

The problem I'm hitting is when we actually try to validate these things with the attached :fn schema:

(mc/validate [:and [:catn ["a" :int] ["b" :keyword]]
              [:fn vector?]]
             [3 :x])
;; true

(mc/parse [:and [:catn ["a" :int] ["b" :keyword]]
           [:fn vector?]]
          [3 :x])
;; => :malli.core/invalid 😢 

I sort of can work around it by checking for e.g. (if it's a map with these keys, then it passes validation). but that's not really ideal.