As an update. I’ve fixed the `ns` oopsie in Suchwow (one file), and the 
coincident `ns` oopsie in Midje (one file). But this happens when running 
Midje’s self-tests against Clojure 1.9alpha11:

> Exception in thread "main" java.lang.IllegalArgumentException: Call to 
> clojure.core/fn did not conform to spec:
> In: [0] val: clojure.core.unify/var-unify fails spec: 
> :clojure.core.specs/arg-list at: [:args :bs :arity-1 :args] predicate: vector?
> In: [0] val: clojure.core.unify/var-unify fails spec: 
> :clojure.core.specs/args+body at: [:args :bs :arity-n] predicate: (cat :args 
> :clojure.core.specs/arg-list :prepost (? map?) :body (* any?))
> :clojure.spec/args  (clojure.core.unify/var-unify [varp v expr binds] 
> (clojure.core/if-let [vb__10124__auto__ (binds v)] 
> (clojure.core.unify/garner-unifiers varp vb__10124__auto__ expr binds) 
> (clojure.core/if-let [vexpr__10125__auto__ (clojure.core/and (varp expr) 
> (binds expr))] (clojure.core.unify/garner-unifiers varp v 
> vexpr__10125__auto__ binds) (if (clojure.core.unify/occurs? varp v expr 
> binds) (throw (java.lang.IllegalStateException. (clojure.core/str "Cycle 
> found in the path " expr))) (clojure.core.unify/bind-phase binds v expr)))))
> , compiling:(clojure/core/unify.clj:82:18)

I suspect the problem is that Midje uses an old version of clojure.core.unify 
(0.5.2). I use that old version because a later versions (like the current 
0.5.7) failed in my use case for no reason I could quickly understand. So I 
decided to just stick with the older, working version because forced upgrades 
make kittens suffer. And I am a kitten. And also: by semver, why should a 
satisfied user of 0.5.2 care about 0.5.7?

(Note: I don’t know whether clojure.core.unify 0.5.7 is conformant to whatever 
spec is breaking.)

So upgrading Midje to Clojure 1.0alpha11 is not turning out as simple as might 
be hoped. 

I know that, pace Casablanca[*], the problems of a guy trying to provide an 
alternative to clojure.test don’t amount to a hill of beans in this crazy 
world. But I offer this datapoint for clojure.core.team consideration.

————

[*] 

Rick: But I've got a job to do, too. Where I'm going, you can't follow. What 
I've got to do, you can't be any part of. Ilsa, I'm no good at being noble, but 
it doesn't take much to see that the problems of three little people don't 
amount to a hill of beans in this crazy world. Someday you'll understand that. 
[Ilsa lowers her head and begins to cry]
Rick: Now, now... 
[Rick gently places his hand under her chin and raises it so their eyes meet]
Rick: Here's looking at you kid. 

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