Bus error -- Re: [mapserver-users] Re: Perl/mapscript error

[Puneet Kishor]

> -----Original Message-----
> From: Lowell Filak [mailto:lfilak at medinaco.org]
> Sent: Friday, May 03, 2002 1:24 PM
> To: Giorgio Volpe; mapserver-users at lists.gis.umn.edu
> Subject: Re: Bus error -- Re: [mapserver-users] Re: 
> Perl/mapscript error
> 
> 
> I think that an error in "eval( $perl )" results in an error 
> in the perl script whereas an error in "eval( "$perl" )" 
> results in an error in the eval and should not bomb the 
> script while "eval( $perl )" could bomb the script but 
> shouldn't in the case of "Not a HASH..." because it's just a 
> warning. More ellaboration on that may need to go to a perl list.
> The source of all of this (which you've already identified) 
> is something that may need cleared up as Puneet suggests, if 
> it's creating that much of a problem.



definitely needs to be cleared up. While I can apply patches Giorgio-style,
that is definitely not a clean solution.


in my case the script bombs completely. I wish I could correct this myself,
but I am still teething as far as Perl is concerned. Perl fascinates me
utterly and completely, but it will be a long while before I will come close
to solving the above kind of problems.

I don't know who the original author of Perl/Mapscript is... I am assuming
it is Steve Lime. Any comments, Steve?

pk/


 





> Lowell F.
> 
> The following message was sent by Giorgio Volpe 
> <giorgio at nauta.it> on Thu, 02 May 2002 15:36:01 +0200.
> 
> > I've discovered, after many hours, that the problem is 
> related, in my
> > case, to the fact that the sub raising the error on its 
> return (clean
> > up) is called in an "eval" and the result of the call is 
> than stored as
> > returned from eval ...
> > 
> > 	@res=eval( $perl )
> > after this, $@ contains "Not a HASH reference at
> > /usr/local/lib/perl/5.6.1/mapscript.pm ..."
> > 
> > if I change it to:
> > 
> > 	@res=eval( "my \@r=$perl;return \@r" )
> > 
> > error disappears!
> > Is it a scope related problem? A little perl confusion?
> > 
> > (if this can be of any neaning for someone, $perl contains a complex
> > reference to an object that is in an other package ... like
> > $me->{binded_obj}->method_causing_error()  )
> > 
> > 
> > 
> > -- 
> > 
> >     Giorgio
> > 
> > -----------------------------------------
>