Re: [Maxima] RE: [Gcl-devel] Using do-symbols in gcl

[Camm Maguire]

Greetings!  Is this still a problem?  to_lisp(); seems to exit the
maxima process for me on Linux.

Take care,

"Mike Thomas" <address@hidden> writes:

> Hi Stavros.
> 
> | (do-symbols (xx) (print xx)) prints out 484 symbols (through
> | $GFACTORSUM), then GCL (not just Maxima) crashes with "Error sending to
> | Maxima:: can not find channel named "sock252"".
> 
> I'm not sure I understand how you did this as I don't understand what
> GFACTORSUM has to do with do-symbols.  Could you please show me what you
> typed at the Maxima prompt?
> 
> Never-the-less I think I got close to your problem as follows.  Here is what
> I got in maxima-local while trying to reproduce your report:
> 
> ==========================================================================
> (C1) (X+1)*((U+V)^2+A*(W+Z)^2),EXPAND;
> 
>           2      2                            2      2                2
> (D1) A X Z  + A Z  + 2 A W X Z + 2 A W Z + A W  X + V  X + 2 U V X + U  X
> 
>                                                             2    2
> 2
>                                                        + A W  + V  + 2 U V +
> U
> (C2) FACTORSUM(%);
> 
>                                           2          2
> (D2)                    (X + 1) (A (Z + W)  + (V + U) )
> (C3) GFACTORSUM(%);
> 
>                                           2          2
> (D3)                    (X + 1) (A (Z + W)  + (V + U) )
> (C4) $GFACTORSUM;
> Incorrect syntax: Premature termination of input at $.
> $
> ^
> (C4)
> (D4)                              GFACTORSUM
> (C5) to_lisp();
> 
> 
> Type (run) to restart
> ==========================================================================
> 
> To_lisp() seems to crash the interpreter directly.  Under XMaxima I get a
> pop-up requestor with a message similar to yours by running to_lisp():
> 
> ==========================================================================
> Error sending to Maxima::
> can not find channel named "sock1892"
> You may need to restart
> ==========================================================================
> 
> This problem occurred for me with the standard Windows Maxima release and
> with a GCL 2.6.1 built CVS maxima local on a P IV Windows XP box.
> 
> |
> | Does anyone know what is going on?  Until this gets fixed, is there some
> | workaround for iterating through all symbols used by Maxima (presumably
> | those in the Maxima package)?
> |
> | This does not happen in GCL-2.5.0 in a command window with no Maxima
> | loaded, but I've CC'd the GCL developers since it crashes GCL.
> 
> Likewise, running the command "(do-symbols (xx) (print xx))" in a normal GCL
> 2.6.1 session (ie, not under Maxima) does not cause problems.
> 
> |  It
> | should be impossible to write user code that crashes the interpreter
> | like this, right?
> 
> Agreed.
> 
> Cheers
> 
> Mike Thomas.
> 
> 
> _______________________________________________
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> 
> 
> 

-- 
Camm Maguire                                            address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah