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Postings from January 2004
Elizabeth Mattijsen wrote:
>
> At 21:33 +0100 1/25/04, Rafael Garcia-Suarez wrote:
> >Elizabeth Mattijsen wrote:
> > > dies with the error:
> > > Recursive call to Perl_load_module in PerlIO_find_layer line 3.
> >> BEGIN failed--compilation aborted line 6.
> > > BEGIN failed--compilation aborted line 6.
> >Because it tries to load PerlIO::Scalar while trying to load
> >PerlIO::Scalar.
>
> Indeed. This works like a charm:
>
> BEGIN {
> require PerlIO::Scalar;
> unshift( @INC,sub {
> my $data; open( my $in,'<',\$data );
> } );
> }
> use Foo;
>
> But I would never have gotten from the error message to this fix.
The error message could be made clearer. But I can't think about a good
error message offhand.
> But this implies that PerlIO::Scalar is only loaded the first time
> you try to do an open() like that. Are there many more situations
> like that in Perl nowadays? Is there a list of this modules that get
> automatically loaded on demand? Could be important for optimizing
> Perl on mod_perl prefork MPMs...
Errno, File::Glob, utf8, attributes, and several PerlIO:: modules, e.g.
all PerlIO::via::*.
> Why would removing stuff with shift() work. Do you mean push()?
Yes, of course !
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