middleware startup crash with Ubuntu openjdk-9

[erno]

I updated my spacemacs and started seeing a crash when doing cider-jack-in. I spied the command line from Messages which reproduces it in the shell:

$ lein update-in :dependencies conj \[org.clojure/tools.nrepl\ \"0.2.12\"\] -- update-in :plugins conj \[refactor-nrepl\ \"2.2.0\"\] -- update-in :plugins conj \[cider/cider-nrepl\ \"0.12.0\"\] -- repl :headless
Error loading refactor-nrepl.middleware: java.lang.ClassNotFoundException: sun.misc.Launcher, compiling:(mranderson047/alembic/v0v3v2/dynapath/v0v2v3/dynapath/defaults.clj:29:3)
Error loading cider.nrepl.middleware.debug: java.lang.ClassNotFoundException: sun.misc.Launcher, compiling:(dynapath/defaults.clj:29:3)
Exception in thread "main" java.lang.RuntimeException: Unable to resolve var: refactor-nrepl.middleware/wrap-refactor in this context, compiling:(/tmp/form-init8653453591385438183.clj:1:8598)
    at clojure.lang.Compiler.analyzeSeq(Compiler.java:6875)
    at clojure.lang.Compiler.analyze(Compiler.java:6669)
    at clojure.lang.Compiler.analyze(Compiler.java:6625)
[...]

Environment & Version information

This was in a pretty barebones lxc container running Ubuntu 16.04. The
error went away by downgrading to openjdk-8.

I'm not sure if all is now working, I still get this error in Messages: "error in process filter: run-hooks: Symbol's function definition is void: live-nrepl-set-print-length" but this seems unrelated to
refactor-nrepl

clj-refactor.el and refactor-nrepl version information

evident here in the reproducer commandline:

$ lein update-in :dependencies conj \[org.clojure/tools.nrepl\ \"0.2.12\"\] -- update-in :plugins conj \[refactor-nrepl\ \"2.2.0\"\] -- update-in :plugins conj \[cider/cider-nrepl\ \"0.12.0\"\] -- repl :headless
nREPL server started on port 36362 on host 127.0.0.1 - nrepl://127.0.0.1:36362

changing refactor-nrepl to 2.3.0-SNAPSHOT above didn't make a difference

clj-version says "clj-refactor 2.2.0, refactor-nrepl 2.2.0"

CIDER version information

;; CIDER 0.12.0 (Seattle), nREPL 0.2.12
;; Clojure 1.8.0, Java 1.8.0_91

Leiningen or Boot version

Leiningen 1.7.0

Emacs version

24.5+1-6ubuntu1

Operating system

Ubuntu 16.04 64-bit

[erno]

I just found technomancy/leiningen#2149 which I guess describes this issue and it's not refactor-nrepl's fault. At least this issue will help the next "google the error message" person find the right way.

[tobias]

This is caused by tobias/dynapath#5. refactor-nrepl is vendoring alembic 0.3.2 which depends on dynapath 0.2.3. That version of dynapath doesn't work with Java 9 - you have to use dynapath 0.2.5. I'm not clear on how this would work with mranderson, but the fix would be to either get alembic updated to dynapath 0.2.5 and use that version, or exclude dynapath from the alembic that is vendored, and depend on dynapath 0.2.5 directly. The full dep vector for the correct version of dynapath is [org.tcrawley/dynapath "0.2.5"].

[benedekfazekas]

thanks for the comment @tobias. does this mean that the issue is fixed in leiningen itself? if so I can give a try to your proposed dep change

[benedekfazekas]

looked into this a bit more hence the pull request for alembic.

the usual leiningen trick of excluding dynapath from alembic and then requiring it top level not likely to work with mranderson. an override like feature could do that but that (although possible) is not currently available in mranderson.

so before investing in mranderson trying to get the dep properly upgraded in alembic.

[benedekfazekas]

new 2.3.0-snapshot is on clojars.