Howdy all,
I'm brand new to this scene (where scene means lisp, closure, linux,
and emacs), so apologies if this has been addressed. My goal is to
make sure I'm up to date before moving forward.
I set up my emacs/slime development environment like various tutorials
suggested, except I received the following errors:
---- *inferior-lisp* ----
(require 'swank.swank)
(swank.swank/ignore-protocol-version "2009-03-07")
(swank.swank/start-server "/tmp/slime.30640" :encoding "iso-latin-1-
unix")
Clojure
user=> nil
user=> java.lang.Exception: Unable to resolve symbol: lazy-seq in this
context (core.clj:70)
user=> java.lang.Exception: No such var: swank.swank/ignore-protocol-
version (NO_SOURCE_FILE:5)
user=> java.lang.Exception: No such var: swank.swank/start-server
(NO_SOURCE_FILE:7)
---- ----
I found another post mentioning that a change had been made to clojure
which was not backwards compatible with slime. Looking at the clojure
api and the above error, it was pretty clear that the culprit is the
fun lazy-seq no longer exists.
I replaced the following code based on what was available in the
current clojure api, and what the old code seemed to be doing:
---- core.clj ----
(defn exception-causes [#^Throwable t]
(lazy-seq
(cons t (when-let [cause (.getCause t)]
(exception-causes cause)))))
=> replaced with =>
(defn exception-causes [#^Throwable t]
(lazy-cons t (when-let [cause (.getCause t)]
(exception-causes cause))))
---- ----
Now my slime process starts without errors and successfully connects
to the swank server, which no longer bombs from trying to use lazy-
seq.
My concern is my fix above is just coding by coincidence; I don't
really understand what is happening beyond the list comprehension and
I'm worried that I'm missing something important because it seems like
that change would have been made already in swank-clojure if it was
that simple.
On the other hand, if it is a valid fix, if anyone else is having this
problem I hope this helps.
Thanks,
Carl
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