Context not set for PersistentList

[luxbock]

I assume the following should work.

New project with Clojure 1.8.0 and cats 1.2.1:

(ns catsss.core
  (:require [cats.builtin]
            [cats.core :as m]))

(m/fmap inc '(1 2 3))

throws:

1. Unhandled java.lang.IllegalArgumentException
   No context is set and it can not be automatically resolved.

NativeConstructorAccessorImpl.java:   -2  sun.reflect.NativeConstructorAccessorImpl/newInstance0
NativeConstructorAccessorImpl.java:   57  sun.reflect.NativeConstructorAccessorImpl/newInstance
DelegatingConstructorAccessorImpl.java:   45  sun.reflect.DelegatingConstructorAccessorImpl/newInstance
          Constructor.java:  526  java.lang.reflect.Constructor/newInstance
            Reflector.java:  180  clojure.lang.Reflector/invokeConstructor
              context.cljc:   34  cats.context$throw_ilegal_argument/invokeStatic
              context.cljc:   34  cats.context$throw_ilegal_argument/invoke
              context.cljc:   87  cats.context$get_current/invokeStatic
              context.cljc:   66  cats.context$get_current/invoke
                 core.cljc:  129  cats.core$fmap/invokeStatic
                 core.cljc:  122  cats.core$fmap/invoke
                      REPL:    9  catsss.core/eval23254

I'm not sure why it doesn't though, as I see in cats.builtin that it should already be extended. If I do the same manually in my REPL then everything works as expected.

[yurrriq]

Hmm. I'm not sure about this one off the top of my head. Maybe @dialelo or @niwinz have a quick answer. Thanks for the report.

[niwinz]

It is very strange, because we have the same thing in tests and it works as expected :S

[c-garcia]

Hi

Same here. Very small project just for testing cats and promesa:

(defproject slack-wb "0.1.0-SNAPSHOT"
  :description "FIXME: write description"
  :url "http://example.com/FIXME"
  :license {:name "Eclipse Public License"
            :url "http://www.eclipse.org/legal/epl-v10.html"}
  :dependencies [[org.clojure/clojure "1.8.0"]
                 [http-kit "2.1.18"]
                 [cheshire "5.6.1"]
                 [funcool/promesa "1.1.1"]
                 [funcool/cats "1.2.1"]])

The offending function

(ns slack-wb.sandbox
  (:require [org.httpkit.client :as http]
            [cheshire.core :refer :all]
            [promesa.core :as p]
            [cats.core :as m]
            [cats.builtin]
            [cats.monad.maybe :as maybe]
            [cats.monad.either :as either]))

(defn ee
  [x]
  (m/fmap inc '(1 2 3 (Integer/parseInt x))))

(defn -main
  [& args]
  (ee (first args)))

Either from the repl or running the code from leiningen, the result is the same:

$ lein run -m slack-wb.sandbox
Exception in thread "main" java.lang.IllegalArgumentException: No context is set and it can not be automatically resolved., compiling:(/private/var/folders/p2/22f9bht534b7d81ybhyyghf40000gn/T/form-init3677970153629996767.clj:1:125)
    at clojure.lang.Compiler.load(Compiler.java:7391)
    at clojure.lang.Compiler.loadFile(Compiler.java:7317)
    at clojure.main$load_script.invokeStatic(main.clj:275)
    at clojure.main$init_opt.invokeStatic(main.clj:277)
    at clojure.main$init_opt.invoke(main.clj:277)
    at clojure.main$initialize.invokeStatic(main.clj:308)
    at clojure.main$null_opt.invokeStatic(main.clj:342)
    at clojure.main$null_opt.invoke(main.clj:339)
    at clojure.main$main.invokeStatic(main.clj:421)
    at clojure.main$main.doInvoke(main.clj:384)
    at clojure.lang.RestFn.invoke(RestFn.java:421)
    at clojure.lang.Var.invoke(Var.java:383)
    at clojure.lang.AFn.applyToHelper(AFn.java:156)
    at clojure.lang.Var.applyTo(Var.java:700)
    at clojure.main.main(main.java:37)
Caused by: java.lang.IllegalArgumentException: No context is set and it can not be automatically resolved.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at clojure.lang.Reflector.invokeConstructor(Reflector.java:180)
    at cats.context$throw_ilegal_argument.invokeStatic(context.cljc:34)
    at cats.context$throw_ilegal_argument.invoke(context.cljc:34)
    at cats.context$get_current.invokeStatic(context.cljc:87)
    at cats.context$get_current.invoke(context.cljc:66)
    at cats.core$fmap.invokeStatic(core.cljc:129)
    at cats.core$fmap.invoke(core.cljc:122)
    at slack_wb.sandbox$ee.invokeStatic(sandbox.clj:23)
    at slack_wb.sandbox$ee.invoke(sandbox.clj:21)
    at slack_wb.sandbox$_main.invokeStatic(sandbox.clj:27)
    at slack_wb.sandbox$_main.doInvoke(sandbox.clj:25)
    at clojure.lang.RestFn.invoke(RestFn.java:397)
    at clojure.lang.Var.invoke(Var.java:375)
    at user$eval5.invokeStatic(form-init3677970153629996767.clj:1)
    at user$eval5.invoke(form-init3677970153629996767.clj:1)
    at clojure.lang.Compiler.eval(Compiler.java:6927)
    at clojure.lang.Compiler.eval(Compiler.java:6917)
    at clojure.lang.Compiler.load(Compiler.java:7379)
    ... 14 more

Just in case it helps, the java version is:

java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

On MacOS X 10.10.5

HTH and thanks in advance

Cristóbal

[niwinz]

Seems like the bug is fixed but is not yet released. In master it works as expected.

Be bug consists that list does not have implemenation of Functor.

[niwinz]

In any case, your code will raise an other exception, because '(1 2 3 (Integer/parseInt x)) will not be evaluated so, the forth element of that list is (Integer/parseInt x) instead of the result of executing that.

Use (list 1 2 3 (Integer/parseInt x)) for that purpose.

[c-garcia]

👍 You are definitely right. I put some code aside in order to make the issue reproducible by you guys and missed the implications of the quote.

Thanks for your help and best regards