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Opaque `java.lang.Exception: Couldn't create directories: ` error #2777

Closed vemv closed 2 years ago

vemv commented 2 years ago

Forwarding from https://github.com/clojure-emacs/cider/issues/3108

The following stacktrace has been observed:

java.lang.Exception: Couldn't create directories: 
 at leiningen.core.utils$mkdirs.invokeStatic (utils.clj:72)
    leiningen.core.utils$mkdirs.invoke (utils.clj:67)
    leiningen.core.eval$prep.invokeStatic (eval.clj:83)
    leiningen.core.eval$prep.invoke (eval.clj:73)
    leiningen.core.eval$eval_in_project.invokeStatic (eval.clj:364)
    leiningen.core.eval$eval_in_project.invoke (eval.clj:358)
    clojure.lang.AFn.applyToHelper (AFn.java:160)
    clojure.lang.AFn.applyTo (AFn.java:144)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.repl$repl.invokeStatic (repl.clj:393)
    leiningen.repl$repl.doInvoke (repl.clj:319)
    clojure.lang.RestFn.applyTo (RestFn.java:142)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.update_in$update_in.invokeStatic (update_in.clj:37)
    leiningen.update_in$update_in.doInvoke (update_in.clj:24)
    clojure.lang.RestFn.applyTo (RestFn.java:146)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.update_in$update_in.invokeStatic (update_in.clj:37)
    leiningen.update_in$update_in.doInvoke (update_in.clj:24)
    clojure.lang.RestFn.applyTo (RestFn.java:146)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.update_in$update_in.invokeStatic (update_in.clj:37)
    leiningen.update_in$update_in.doInvoke (update_in.clj:24)
    clojure.lang.RestFn.applyTo (RestFn.java:146)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.update_in$update_in.invokeStatic (update_in.clj:37)
    leiningen.update_in$update_in.doInvoke (update_in.clj:24)
    clojure.lang.RestFn.applyTo (RestFn.java:146)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.update_in$update_in.invokeStatic (update_in.clj:37)
    leiningen.update_in$update_in.doInvoke (update_in.clj:24)
    clojure.lang.RestFn.applyTo (RestFn.java:146)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$partial_task$fn__7356.doInvoke (main.clj:284)
    clojure.lang.RestFn.applyTo (RestFn.java:139)
    clojure.lang.AFunction$1.doInvoke (AFunction.java:31)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.core$apply.invokeStatic (core.clj:667)
    clojure.core$apply.invoke (core.clj:660)
    leiningen.core.main$apply_task.invokeStatic (main.clj:334)
    leiningen.core.main$apply_task.invoke (main.clj:320)
    leiningen.core.main$resolve_and_apply.invokeStatic (main.clj:343)
    leiningen.core.main$resolve_and_apply.invoke (main.clj:336)
    leiningen.core.main$_main$fn__7445.invoke (main.clj:453)
    leiningen.core.main$_main.invokeStatic (main.clj:442)
    leiningen.core.main$_main.doInvoke (main.clj:439)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.core$apply.invokeStatic (core.clj:665)
    clojure.main$main_opt.invokeStatic (main.clj:491)
    clojure.main$main_opt.invoke (main.clj:487)
    clojure.main$main.invokeStatic (main.clj:598)
    clojure.main$main.doInvoke (main.clj:561)
    clojure.lang.RestFn.applyTo (RestFn.java:137)
    clojure.lang.Var.applyTo (Var.java:705)
    clojure.main.main (main.java:37)

I don't know what this stacktrace means, or what directory was Lein trying to create. The stacktrace doesn't appear to relate to the plugins that Lein was running (enrich-classpath + lein-git-down).

It would be appreciated if at least this defn failed a little more informatively.

Anyway does it ring a bell?

Environment

Leiningen 2.9.3 on Java 16.0.1 OpenJDK 64-Bit Server VM

technomancy commented 2 years ago

This exception comes from this code: (throw (Exception. (str "Couldn't create directories: " (io/file f)))) so it is already trying to tell you what directory it failed to make; the problem is it must be trying to create a directory named "" which of course fails.

Leiningen will never try to create a directory like that on its own. This must be happening due to either a mistake in your project.clj file (did you add something like :source-paths [""]?) or a bug in a plugin you're using.

technomancy commented 2 years ago

Looks like #2778 takes care of this.

vemv commented 2 years ago

This must be happening due to either a mistake in your project.clj file (did you add something like :source-paths [""]?) or a bug in a plugin you're using.

Yes that was the case, we faced a corner case in a plugin. Probably Lein handling could have been more informative, but https://github.com/technomancy/leiningen/pull/2778 already improves things.

From my side the chances of that plugin making the same mistake again are pretty low so it seems good to leave things as-is.

Thanks!