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Editorial Team
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Asked: 2026-06-05T09:10:15+00:00

I’m trying to load hunchentoot via quicklisp in slime , and getting the following

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I’m trying to load hunchentoot via quicklisp in slime, and getting the following error:

READ error during COMPILE-FILE:

  :ASCII stream decoding error on
  #<SB-SYS:FD-STREAM
    for "file [redacted]/dists/quicklisp/software/rfc2388-20120107-http/rfc2388.asd"
    {100607B723}>:

    the octet sequence #(196) cannot be decoded.

  (in form starting at line: 29, column: 29,
  file-position: 1615)
[Condition of type ASDF:LOAD-SYSTEM-DEFINITION-ERROR]

I get this when trying to run either:

(ql:quickload "hunchentoot")

Or simply:

(ql:quickload "rfc2388")

It seems that others are getting this too. I found one hint at a possible answer, saying:

The system file is encoded as UTF-8. 
I'm not sure how to configure things so that SBCL on Windows starts with 
UTF-8 as its default encoding for loading sources, but that's what you 
need to do.

From there, I’ve tried (based on e.g. [this] adding the following to my emacs config:

(set-language-environment "UTF-8")
(setq slime-lisp-implementations
      '((sbcl ("/opt/local/bin/sbcl") :coding-system utf-8-unix)))
(setq slime-net-coding-system 'utf-8-unix)

But… I still get the same error, even after completely re-starting emacs, to make sure I had a fresh Slime that was reading the above config.

So, what am I missing, and/or otherwise how can I get this to load?

Thanks in advance! (More thanks to come for a successful answer. 😉

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1 Answer

  1. Editorial Team

    Have you checked your locale settings? Emacs configuration only tells it what coding systems to set for communication between SLIME and SWANK.

    You can check for locale settings with /usr/bin/locale, for example:

    navi ~ » locale
LANG=pl_PL.UTF-8
LC_CTYPE=pl_PL.UTF-8
LC_NUMERIC=pl_PL.UTF-8
LC_TIME=pl_PL.UTF-8
LC_COLLATE="pl_PL.UTF-8"
LC_MONETARY=pl_PL.UTF-8
LC_MESSAGES=C
LC_PAPER=pl_PL.UTF-8
LC_NAME="pl_PL.UTF-8"
LC_ADDRESS="pl_PL.UTF-8"
LC_TELEPHONE="pl_PL.UTF-8"
LC_MEASUREMENT=pl_PL.UTF-8
LC_IDENTIFICATION=pl_PL.UTF-8
LC_ALL=
navi ~ »

    Mine is setup for UTF-8 everywhere, as you can see, except for displaying ‘C’ messages.

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