Bug#938993: clisp crashes under slime when doing tab-completion

[Christoph Badura <bad@bsd.de>]

Package: clisp
Version: 1:2.49.20180218+really2.49.92-3+b2
Severity: grave
Justification: renders package unusable

Dear Maintainer,

this is on a Raspberry PI 2 installed off https://people.debian.org/~gwolf/raspberrypi/20190628/20190628_raspberry-pi-2_buster_PREVIEW.img.xz

To reproduce:

apt-get -qy install emacs slime clisp

emacs -q -nw
ESC:(require 'slime)RET
ESCxslimeRET
TAB

The mini-buffer shows the message "Lisp connection closed unexpectedly"

The *inferior-lisp* buffer has, apart from the usual warnings, the following
relevant output:

*** - handle_fault error2 ! address = 0x60022 not in [0x48060004,0x4835739c) !
SIGSEGV cannot be cured. Fault address = 0x60022.
GC count: 43
Space collected by GC: 0 27406896
Run time: 15 153135
Real time: 19 963098
GC time: 2 133641
Permanently allocated: 94496 bytes.
Currently in use: 4772368 bytes.
Free space: 1090634 bytes.

Process inferior-lisp segmentation fault

The expected outcome would have been a working REPL, of course. ;-)

In case you are wondering, I've updated slime, cl-swank and clisp to the
versions in testing. But that explodes while trying to load swank. I'll
open a separate bug for that.

BTW, could someone address the warnings in #655273?  That would be nice.

Thanks,
--chb

-- System Information:
Debian Release: 10.0
  APT prefers stable
  APT policy: (900, 'stable'), (500, 'stable-updates'), (400, 'testing')
Architecture: armhf (armv7l)

Kernel: Linux 4.19.0-5-armmp (SMP w/4 CPU cores)
Kernel taint flags: TAINT_CRAP
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages clisp depends on:
ii  libc6          2.28-10
ii  libffcall1b    2.1-2
ii  libncurses6    6.1+20181013-2
ii  libreadline7   7.0-5
ii  libsigsegv2    2.12-2
ii  libtinfo6      6.1+20181013-2
ii  libunistring2  0.9.10-1

clisp recommends no packages.

Versions of packages clisp suggests:
pn  clisp-doc                 <none>
pn  clisp-module-berkeley-db  <none>
pn  clisp-module-clx          <none>
pn  clisp-module-dbus         <none>
pn  clisp-module-gdbm         <none>
pn  clisp-module-pcre         <none>
pn  clisp-module-postgresql   <none>
pn  clisp-module-zlib         <none>
pn  gdb                       <none>
ii  slime                     2:2.23+dfsg-2

-- no debconf information