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[Sbcl-help] Overwriting FUN-INFO?

From: Vamsee Kanakala <vamlists@gm...> - 2007-05-22 21:47

Hi,

I was trying to deploy a webapp on a Xen-based vps, where I'm using the 
binary 1.0.5 release. Though loading the webapp on my development system 
works fine, trying do deploy it on the vps gives me several of these errors:

debugger invoked on a SIMPLE-ERROR in thread #<THREAD "initial thread" 
{A695679}>:
  overwriting old FUN-INFO
    #<SB-C::FUN-INFO :ATTRIBUTES (FOLDABLE FLUSHABLE 
SB-C::UNSAFELY-FLUSHABLE)>
  for ROTATE-BYTE

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE] Go ahead, overwrite it.
  1: [RETRY   ] Retry performing #<ASDF:LOAD-OP NIL {AAF6589}> on
                #<ASDF:CL-SOURCE-FILE "compiler" {A994189}>.
  2: [ACCEPT  ] Continue, treating #<ASDF:LOAD-OP NIL {AAF6589}> on
                #<ASDF:CL-SOURCE-FILE "compiler" {A994189}> as having been
                successful.
  3: [ABORT   ] Exit debugger, returning to top level.

(SB-C::%DEFKNOWN
 (ROTATE-BYTE)
 (SFUNCTION (INTEGER BYTE-SPECIFIER INTEGER) INTEGER)
 112)
0] 0


I'm not sure what the cause of these errors might be. Can somebody throw 
some light on this?

Thanks,
Vamsee.

Thread View

Thread	Author	Date
[Sbcl-help] Overwriting FUN-INFO?	Vamsee Kanakala <vamlists@gm...>

Re: [Sbcl-help] Overwriting FUN-INFO?

From: Juho Snellman <jsnell@ik...> - 2007-05-23 21:56

Vamsee Kanakala <vamlists@...> writes:

> Hi,
> 
> I was trying to deploy a webapp on a Xen-based vps, where I'm using the 
> binary 1.0.5 release. Though loading the webapp on my development system 
> works fine, trying do deploy it on the vps gives me several of these errors:
> 
> debugger invoked on a SIMPLE-ERROR in thread #<THREAD "initial thread" 
> {A695679}>:
>   overwriting old FUN-INFO
>     #<SB-C::FUN-INFO :ATTRIBUTES (FOLDABLE FLUSHABLE 
> SB-C::UNSAFELY-FLUSHABLE)>
>   for ROTATE-BYTE

You're trying to load the sb-rotate-byte contrib (which is a
dependency of sb-md5) multiple times into the same image. That should
not be happening. The only ways I can imagine that happening would be
due to using the :force t argument for asdf:load-op, or some really
baroque scenarios involving transferring core files with sb-md5
already preloaded from one server to another where the sbcl contrib
files have different timestamps.

-- 
Juho Snellman

Re: [Sbcl-help] Overwriting FUN-INFO?

From: Vamsee Kanakala <vamlists@gm...> - 2007-05-24 06:03

Juho Snellman wrote:
> You're trying to load the sb-rotate-byte contrib (which is a
> dependency of sb-md5) multiple times into the same image. That should
> not be happening. The only ways I can imagine that happening would be
> due to using the :force t argument for asdf:load-op, or some really
> baroque scenarios involving transferring core files with sb-md5
> already preloaded from one server to another where the sbcl contrib
> files have different timestamps.
>   

Thanks a lot for the reply, in my case I'm guessing it's the first case. 
I don't use sb-rotate-byte in my code directly, but two of the libraries 
that I'm using use it. One is ironclad, and the .asd file looks normal 
enough - I can see this in defsystem:

#+sbcl :depends-on #+sbcl (sb-rotate-byte)

But the other library, cl-utilities uses this in it's .asd file:

;; Sometimes we can accelerate byte rotation on SBCL by using the
;; SB-ROTATE-BYTE extension. This loads it.
#+sbcl
(eval-when (:compile-toplevel :load-toplevel :execute)
  (handler-case (progn
          (require :sb-rotate-byte)
          (pushnew :sbcl-uses-sb-rotate-byte *features*))
    (error () (delete :sbcl-uses-sb-rotate-byte *features*))))

My lisp-fu is not advanced enough to see if the latter is a problem, but 
could there be a problem with it? If yes, how can I fix it?

Thanks much,
Vamsee.