Loading slime 2.27 going into debugger as of last night.

[Jeff Cunningham]

I asked this question over on sbcl-help already. Stas objected. So I'll ask it again here.

Last night I started running into the debugger when trying to start slime in emacs. This morning I
decided to delete all my .slime/ fasls, all of .cache/common-lisp/ all of ~/quicklisp and start
with a fresh copy of quicklisp.lisp. I updated my arch system (slightly newer version of emacs)
then tried to reinstall quicklisp. 

The problem occurs upstream of emacs ever being started. I can reproduce the problem with these
steps:

$ rm -rf .slime .cache/common-lisp/* quicklisp
$ curl -O https://beta.quicklisp.org/quicklisp.lisp
$ sbcl --load quicklisp.lisp

* (quicklisp-quickstart:install)

* (ql:quickload "quicklisp-slime-helper")

To load "quicklisp-slime-helper":
  Load 1 ASDF system:
    asdf
  Install 3 Quicklisp releases:
    alexandria quicklisp-slime-helper slime
; Fetching #<URL "http://beta.quicklisp.org/archive/slime/2022-02-20/slime-v2.27.tgz">
; 803.72KB
==================================================
823,006 bytes in 0.09 seconds (9273.62KB/sec)
; Fetching #<URL
"http://beta.quicklisp.org/archive/alexandria/2022-02-20/alexandria-20220220-git.tgz"> ; 55.16KB
==================================================
56,486 bytes in 0.01 seconds (5516.21KB/sec)
; Fetching #<URL
"http://beta.quicklisp.org/archive/quicklisp-slime-helper/2015-07-09/quicklisp-slime-helper-20150709-git.tgz">
; 2.16KB ==================================================
2,211 bytes in 0.00 seconds (0.00KB/sec)
; Loading "quicklisp-slime-helper"
[package swank-loader]............................
[package swank/backend]...........................
[package swank/rpc]...............................
[package swank/match].............................
[package swank-mop]...............................
[package swank]...................................
[package swank/source-path-parser]................
[package swank/source-file-cache].................
[package swank/sbcl]..............................
[package swank/gray]..............................
........
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-util.lisp" (written
24 MAR 2022 12:08:30 PM): .

; wrote /home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-util.fasl
; compilation finished in 0:00:00.010
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-repl.lisp" (written
24 MAR 2022 12:08:30 PM): ......................................... [package swank-repl]..

; wrote /home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-repl.fasl
; compilation finished in 0:00:00.040
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-c-p-c.lisp"
(written 24 MAR 2022 12:08:30 PM): .

; wrote /home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-c-p-c.fasl
; compilation finished in 0:00:00.030
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-arglists.lisp"
(written 24 MAR 2022 12:08:30 PM): ................

; wrote /home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-arglists.fasl
; compilation finished in 0:00:00.360
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-fuzzy.lisp"
(written 24 MAR 2022 12:08:30 PM): ...

; wrote /home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-fuzzy.fasl
; compilation finished in 0:00:00.080
; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-fancy-inspector.lisp"
(written 24 MAR 2022 12:08:30 PM): ........ .

; wrote
/home/jcunningham/.slime/fasl/2.27/sbcl-2.2.2-linux-x86-64/contrib/swank-fancy-inspector.fasl ;
compilation finished in 0:00:00.163 ; compiling file
"/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-presentations.lisp"
(written 24 MAR 2022 12:08:30 PM): ;; ;; Error compiling
/home/jcunningham/quicklisp/dists/quicklisp/software/slime-v2.27/contrib/swank-presentations.lisp:
;;   SWANK-REPL also exports the following symbols: ;;   (SWANK-REPL:CREATE-REPL
SWANK-REPL:LISTENER-GET-VALUE ;;    SWANK-REPL:CLEAR-REPL-VARIABLES SWANK-REPL:LISTENER-SAVE-VALUE
;;    SWANK-REPL:LISTENER-EVAL SWANK-REPL:REDIRECT-TRACE-OUTPUT)
;; See also:
;;   The ANSI Standard, Macro DEFPACKAGE
;; 

debugger invoked on a SB-INT:PACKAGE-AT-VARIANCE-ERROR in thread
#<THREAD "main thread" RUNNING {10019B0073}>:
  SWANK-REPL also exports the following symbols:
  (SWANK-REPL:CREATE-REPL SWANK-REPL:LISTENER-GET-VALUE
   SWANK-REPL:CLEAR-REPL-VARIABLES SWANK-REPL:LISTENER-SAVE-VALUE
   SWANK-REPL:LISTENER-EVAL SWANK-REPL:REDIRECT-TRACE-OUTPUT)
See also:
  The ANSI Standard, Macro DEFPACKAGE

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [DROP-THEM                    ] Unexport them.
  1: [KEEP-THEM                    ] Keep exporting them.
  2: [TRY-RECOMPILING              ] Recompile swank-loader and try loading it again
  3: [RETRY                        ] Retry
                                     loading FASL for #<SWANK-LOADER-FILE "swank" "swank-loader">.
  4: [ACCEPT                       ] Continue, treating
                                     loading FASL for #<SWANK-LOADER-FILE "swank" "swank-loader">
                                     as having been successful.
  5:                                 Retry ASDF operation.
  6: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the
                                     configuration.
  7:                                 Retry ASDF operation.
  8:                                 Retry ASDF operation after resetting the
                                     configuration.
  9: [ABORT                        ] Give up on "quicklisp-slime-helper"
 10: [REGISTER-LOCAL-PROJECTS      ] Register local projects and try again.
 11:                                 Exit debugger, returning to top level.

(SB-IMPL::NOTE-PACKAGE-VARIANCE :FORMAT-CONTROL "~A also exports the following symbols:~%  ~S"
:FORMAT-ARGUMENTS ("SWANK-REPL" (SWANK-REPL:CREATE-REPL SWANK-REPL:LISTENER-GET-VALUE
SWANK-REPL:CLEAR-REPL-VARIABLES SWANK-REPL:LISTENER-SAVE-VALUE SWANK-REPL:LISTENER-EVAL
SWANK-REPL:REDIRECT-TRACE-OUTPUT)) :PACKAGE #<PACKAGE "SWANK-REPL">) 0] 


Neither locate nor find show any signs of any other copy of swank or slime on this system. The only
thing in my .sbclrc is this:

;;; The following lines added by ql:add-to-init-file:
;;#-quicklisp
(let ((quicklisp-init (merge-pathnames "quicklisp/setup.lisp" (user-homedir-pathname))))
  (when (probe-file quicklisp-init)
    (load quicklisp-init)))

;;; Added this to test reading bad char streams
(setf sb-impl::*default-external-format* :utf-8)

;;; Added this so I can change the names of package symbols and get
;;; prompted about whether or not I want to drop them:
(setf sb-ext:*on-package-variance* '(:error t))


I'm running out of ideas. Does anyone have any?

Thanks.

--Jeff