Bug#693682: Core compression

[Christoph Egger]

Hi!

  This is really strange:

> % sbcl
> This is SBCL 1.1.1.0.debian, an implementation of ANSI Common Lisp.
> More information about SBCL is available at <http://www.sbcl.org/>.

> SBCL is free software, provided as is, with absolutely no warranty.
> It is mostly in the public domain; some portions are provided under
> BSD-style licenses.  See the CREDITS and COPYING files in the
> distribution for more information.
> * *features*

> (:ALIEN-CALLBACKS :ANSI-CL :BSD :C-STACK-IS-CONTROL-STACK :COMMON-LISP
>  :COMPARE-AND-SWAP-VOPS :COMPLEX-FLOAT-VOPS :CYCLE-COUNTER :ELF :FLOAT-EQL-VOPS
>  :FREEBSD :GCC-TLS :GENCGC :IEEE-FLOATING-POINT :INLINE-CONSTANTS
>  :LINKAGE-TABLE :LITTLE-ENDIAN :MEMORY-BARRIER-VOPS :MULTIPLY-HIGH-VOPS
>  :OS-PROVIDES-BLKSIZE-T :OS-PROVIDES-DLADDR :OS-PROVIDES-DLOPEN
>  :OS-PROVIDES-GETPROTOBY-R :OS-PROVIDES-POLL :OS-PROVIDES-PUTWC
>  :OS-PROVIDES-SUSECONDS-T :RAW-INSTANCE-INIT-VOPS :SB-CORE-COMPRESSION :SB-DOC
>  :SB-EVAL :SB-LDB :SB-PACKAGE-LOCKS :SB-SOURCE-LOCATIONS :SB-TEST :SB-UNICODE
>  :SBCL :STACK-ALLOCATABLE-CLOSURES :STACK-ALLOCATABLE-FIXED-OBJECTS
>  :STACK-ALLOCATABLE-LISTS :STACK-ALLOCATABLE-VECTORS
>  :STACK-GROWS-DOWNWARD-NOT-UPWARD :UNIX :UNWIND-TO-FRAME-AND-CALL-VOP :X86-64)

> * (save-lisp-and-die (car (last sb-ext:*posix-argv*))
>                    :compression 9)
> [undoing binding stack and other enclosing state... done]
> [saving current Lisp image into sbcl:
> writing 5200 bytes from the read-only space at 0x20000000
> compressed 32768 bytes into 1546 at level 9
> writing 3040 bytes from the static space at 0x20100000
> compressed 32768 bytes into 1177 at level 9
> writing 42991616 bytes from the dynamic space at 0x1000000000
> compressed 42991616 bytes into 9078134 at level 9
> done]

Is :SB-CORE-COMPRESSION part of your *features* and you're using the
debian binary (easiest to spot if the version in the MOTD has .debian at
the end)?

Regards

    Christoph