I'm using boot-cljs-repl https://github.com/adzerk-oss/boot-cljs-repl

basically I start cljs repl by typing (start-repl) in a clj repl

the problem is when I try to evaluate a cljs buffer, it yells ... needs a cljs repl

I guess it's b/c the repl is detected as clj

and the (start-repl) didn't change (of course it couldn't) the emacs buffer's info that it's become a cljs repl

how can I fix this?

@myguidingstar: there was an issue open some time ago and I discovered that I did not configure cider (or nrepl cannot remember) correctly

hmm, I think I followed the instructions

https://github.com/clojure-emacs/cider/issues/1611

Oh I remember hardcoding .cljs files

will try that

many thanks

No problem ;)

hmm, I used to do that, but no longer

so that's not the problem

> and the (start-repl) didn't change (of course it couldn't) the emacs buffer's info that it's become a cljs repl Actually, if you have the cider midddleware properly set up, it should detect the repl type automatically.

@myguidingstar: how do you start your repl?

Any known issues with cider 20160524.714? I just pulled new packages in Emacs and am now getting Wrong number of arguments: when-let, 1

That's when I do a cider-connect.

what version of emacs are you running?

I was just reading malabarba's blog and saw that when-let is a macro in emacs 25.1 and which is in prerelease.

nah. they make sure its bound if its not already

24.5.1

Backtrace:

Debugger entered--Lisp error: (wrong-number-of-arguments when-let 1)
  signal(wrong-number-of-arguments (when-let 1))
  #[(&rest body) "^H\203\f^@^H\211A^P@\202^S^@\304\305\306^HGD\"\211^YG\307U\203#^@	\211A^Q@\202*^@\304\305\306	GD\"^z	@^[\310\n^KDC\311\n^HBBE+\207" [body --cl-rest-- var value signal wrong-number-of-arguments when-let 2 let when] 6 ("/home/pls/.emacs.d/elpa/scion-20130315.555/scion.elc" . 1787)](((port (and d (nrepl-extract-port (cider--file-path d))))) (list (file-name-nondirectory (directory-file-name d)) port))
  (when-let ((port (and d (nrepl-extract-port (cider--file-path d))))) (list (file-name-nondirectory (directory-file-name d)) port))
  (closure ((paths) (dir . "/home/pls/work/oboe/src/clj/oboe/") t) (d) (when-let ((port (and d (nrepl-extract-port (cider--file-path d))))) (list (file-name-nondirectory (directory-file-name d)) port)))("~/work/oboe/")
  mapcar((closure ((paths) (dir . "/home/pls/work/oboe/src/clj/oboe/") t) (d) (when-let ((port (and d (nrepl-extract-port (cider--file-path d))))) (list (file-name-nondirectory (directory-file-name d)) port))) ("~/work/oboe/"))
  (let* ((paths (cider--running-nrepl-paths)) (proj-ports (mapcar (lambda (d) (when-let ((port ...)) (list (file-name-nondirectory ...) port))) (cons (clojure-project-dir dir) paths)))) (seq-uniq (delq nil proj-ports)))
  cider-locate-running-nrepl-ports("/home/pls/work/oboe/src/clj/oboe/")
  (let* ((change-dir-p (file-remote-p default-directory)) (default-directory (if change-dir-p "~/" default-directory))) (cider-locate-running-nrepl-ports (if change-dir-p nil default-directory)))
  (if localp (let* ((change-dir-p (file-remote-p default-directory)) (default-directory (if change-dir-p "~/" default-directory))) (cider-locate-running-nrepl-ports (if change-dir-p nil default-directory))) (let ((vec (vector "sshx" nil host "" nil)) (dir (if (file-remote-p default-directory) (progn (let* (... ... ... ... ... ...) (ignore cur-method cur-user cur-host cur-localname cur-hop) (if ... ...)))))) (tramp-maybe-open-connection vec) (save-current-buffer (set-buffer (tramp-get-connection-buffer vec)) (cider-locate-running-nrepl-ports dir))))
  (let ((localp (or (nrepl-local-host-p host) (not (assoc-string host ssh-hosts))))) (if localp (let* ((change-dir-p (file-remote-p default-directory)) (default-directory (if change-dir-p "~/" default-directory))) (cider-locate-running-nrepl-ports (if change-dir-p nil default-directory))) (let ((vec (vector "sshx" nil host "" nil)) (dir (if (file-remote-p default-directory) (progn (let* ... ... ...))))) (tramp-maybe-open-connection vec) (save-current-buffer (set-buffer (tramp-get-connection-buffer vec)) (cider-locate-running-nrepl-ports dir)))))
  cider--infer-ports("localhost" (("core") ("zuul") ("xl2") ("xl1") ("xz2") ("xz1")))
  (cider--completing-read-port host (cider--infer-ports host ssh-hosts))
  (or (cadr sel-host) (cider--completing-read-port host (cider--infer-ports host ssh-hosts)))
  (let* ((ssh-hosts (cider--ssh-hosts)) (hosts (seq-uniq (append (if cider-host-history (progn (list ...))) (list (list (cider-current-host))) cider-known-endpoints ssh-hosts (if (file-remote-p default-directory) (progn (quote ...)))))) (sel-host (cider--completing-read-host hosts)) (host (car sel-host)) (port (or (cadr sel-host) (cider--completing-read-port host (cider--infer-ports host ssh-hosts))))) (list host port))
  cider-select-endpoint()
  call-interactively(cider-connect nil nil)
  command-execute(cider-connect)

Failure comes after hitting enter at the host prompt.

hmm

i looked at the scion package, and it looks like both scion and cider define a when-let

Ah, I was just noticing that was an odd duck to see in this trace.

Well, I'm not doing much Haskell at the moment. I'll trying disabling it.

and the scion one is simpler

i think it can only take a single binding whereas the traditional when-let can take a seq of them and only invoke its clause when all are bound

yeah, that seems to be what's up.

Yep, that did it.

Thanks.

Would be nice to report this to them 😉

@malabarba: nice articles on upcoming features. read it this morning and already put the knowledge to use

@adamfrey: Same here. I get this error as well.

Did you discover anything new?

no. you can use M-x toggle-debug-no-error and you can get an elisp stack trace that shows the path to that error, but I haven’t gotten the chance to look into it yet

@adamfrey: I did that. It seems to be related with company mode, in particular the company-capf backend. Do you remember when the problem started? What version of cider started to display this behavior?

I update my snapshot pretty frequently, and I changed to using company mode recently, so I don’t know when it appeared

OK, I'm filing an issue, I guess

https://github.com/clojure-emacs/cider/issues/1766

@adamfrey: Please feel free to add your own observations.