This may be due to the plugins overriding a dependency that Leiningen itself needs. There was an issue like this <https://github.com/weavejester/lein-ring/issues/203> logged with Lein-Ring, which I notice you're using. Try updating the Lein-Ring version to 0.12.5 and see if that fixes the issue.
On Tue, 4 Feb 2020 at 13:18, 'Simon Brooke' via Clojure < clojure@googlegroups.com> wrote: > Hi all > > I recently wanted to do some work on a project of mine I've not worked on > for more than a year, and found to my great surprise that it will no longer > build. Full details of the bug are here > <https://github.com/journeyman-cc/smeagol/issues/43>, but the core seems > to be: > > clojure.lang.Compiler$CompilerException: Syntax error macroexpanding > clojure.core/fn at (clojure/core/unify.clj:83:18). > #:clojure.error{:phase :macro-syntax-check, :line 83, :column 18, :source > "clojure/core/unify.clj", :symbol clojure.core/fn} > at clojure.lang.Compiler.checkSpecs (Compiler.java:6971) > > ... > > Caused by: clojure.lang.ExceptionInfo: Call to clojure.core/fn did not > conform to spec. > #:clojure.spec.alpha{:problems ({:path [:fn-tail :arity-1 :params], :pred > clojure.core/vector?, :val clojure.core.unify/var-unify, :via > [:clojure.core.specs.alpha/params+body :clojure.core.specs.alpha/param-list > :clojure.core.specs.alpha/param-list], :in [0]} {:path [:fn-tail :arity-n], > :pred (clojure.core/fn [%] (clojure.core/or (clojure.core/nil? %) > (clojure.core/sequential? %))), :val clojure.core.unify/var-unify, :via > [:clojure.core.specs.alpha/params+body > :clojure.core.specs.alpha/params+body], :in [0]}), :spec > #object[clojure.spec.alpha$regex_spec_impl$reify__2509 0x7c214cc0 > "clojure.spec.alpha$regex_spec_impl$reify__2509@7c214cc0"], :value > (clojure.core.unify/var-unify [G__813 G__814 G__815 G__816] > (clojure.core/if-let [vb__806__auto__ (G__816 G__814)] > (clojure.core.unify/garner-unifiers G__813 vb__806__auto__ G__815 G__816) > (clojure.core/if-let [vexpr__807__auto__ (clojure.core/and (G__813 G__815) > (G__816 G__815))] (clojure.core.unify/garner-unifiers G__813 G__814 > vexpr__807__auto__ G__816) (if (clojure.core.unify/occurs? G__813 G__814 > G__815 G__816) (throw (java.lang.IllegalStateException. (clojure.core/str > "Cycle found in the path " G__815))) (clojure.core.unify/bind-phase G__816 > G__814 G__815))))), :args (clojure.core.unify/var-unify [G__813 G__814 G__815 > G__816] (clojure.core/if-let [vb__806__auto__ (G__816 G__814)] > (clojure.core.unify/garner-unifiers G__813 vb__806__auto__ G__815 G__816) > (clojure.core/if-let [vexpr__807__auto__ (clojure.core/and (G__813 G__815) > (G__816 G__815))] (clojure.core.unify/garner-unifiers G__813 G__814 > vexpr__807__auto__ G__816) (if (clojure.core.unify/occurs? G__813 G__814 > G__815 G__816) (throw (java.lang.IllegalStateException. (clojure.core/str > "Cycle found in the path " G__815))) (clojure.core.unify/bind-phase G__816 > G__814 G__815)))))} > at clojure.spec.alpha$macroexpand_check.invokeStatic (alpha.clj:705) > > ... > > > No functions of mine occur anywhere in the stacktrace, but below all the > clojure compiler functions I get to: > > clojure.lang.RestFn.invoke (RestFn.java:408) > leiningen.core.utils$require_resolve.invokeStatic (utils.clj:102) > leiningen.core.utils$require_resolve.invoke (utils.clj:95) > leiningen.core.utils$require_resolve.invokeStatic (utils.clj:105) > leiningen.core.utils$require_resolve.invoke (utils.clj:95) > leiningen.core.main$lookup_task_var.invokeStatic (main.clj:69) > leiningen.core.main$lookup_task_var.invoke (main.clj:65) > leiningen.core.main$pass_through_help_QMARK_.invokeStatic (main.clj:79) > leiningen.core.main$pass_through_help_QMARK_.invoke (main.clj:73) > leiningen.core.main$task_args.invokeStatic (main.clj:82) > leiningen.core.main$task_args.invoke (main.clj:81) > leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:339) > leiningen.core.main$resolve_and_apply.invoke (main.clj:336) > leiningen.core.main$_main$fn__6681.invoke (main.clj:452) > leiningen.core.main$_main.invokeStatic (main.clj:442) > leiningen.core.main$_main.doInvoke (main.clj:439) > > > The versions of Leiningen I am currently using are `Leiningen 2.9.1 on > Java 1.8.0_242 OpenJDK 64-Bit Server VM` and `Leiningen 2.9.1 on Java > 11.0.6 OpenJDK 64-Bit Server VM`; I don't recall the version I was using a > year ago. None of the project dependencies have changed, I'm running with this > project.clj > <https://github.com/journeyman-cc/smeagol/blob/master/project.clj>, which > certainly did build thirteen months ago. > > My guess is that because my code has not changed, the version of Clojure > used has not changed, and the dependencies have not changed, the only thing > which is not controlled for is Leiningen. Has anyone else seen a problem > like this, and if so how did you cure it? > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/clojure/4ce229bf-99c0-4922-aca2-8f0565e7feb0%40googlegroups.com > <https://groups.google.com/d/msgid/clojure/4ce229bf-99c0-4922-aca2-8f0565e7feb0%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- James Reeves booleanknot.com -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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