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Solving this is going to take some effort. Here is a small piece of code that reproduces the error:

#!/usr/bin/perl use Storable qw(nstore_fd fd_retrieve); use IO::Zlib; use Data::Dumper; my $test = { foo => "bar" }; my $fh = IO::Zlib->new("out.gz", "wb"); nstore_fd($test, $fh); $fh->close; my $fh2 = IO::Zlib->new("out.gz", "rb"); my $href = fd_retrieve($fh2); $fh2->close; print Dumper $href;

The error (message) is the same but I'm not positive the error itself is. In particular, $AUTOLOAD in this instance is IO::Zlib::FILENO (not READ) and it is being called from Storable::_store_fd (which is in _store_fd.al) which is in turn being called by Storable::nstore_fd (in nstore_fd.al)... But, going back and printing the argument when in each of those functions shows it to be IO::Zlib=GLOB(0x81242f8) which is a glob ref as desired. It is only when we get to Zlib's AUTOLOAD that it prints as IO::Zlib=HASH(0x81b84b8). So, it looks like the call to fileno() in _store_fd() is where things are breaking.

And, sure enough...

perl -MIO::Zlib -e '$fh = IO::Zlib->new("test.gz", "wb"); print fileno +($fh)'
That's a minimal demonstration of the problem. (So, you can stop looking at Storable as the real problem, anyway.)

Adding some quick prints to see what's going on...

sub AUTOLOAD { print "AUTOLOAD(@_)\n"; my $self = shift; print $self, " $AUTOLOAD\n@{[caller]}\n"; $AUTOLOAD =~ s/.*:://; $AUTOLOAD =~ tr/a-z/A-Z/; return tied(*{$self})->$AUTOLOAD(@_); }
And running that:
$ perl -MIO::Zlib -e '$fh = IO::Zlib->new("test.gz", "wb"); print file +no($fh)' AUTOLOAD(IO::Zlib=HASH(0x81e8b30)) IO::Zlib=HASH(0x81e8b30) IO::Zlib::FILENO main -e 1 Not a GLOB reference at /usr/lib/perl5/site_perl/5.8.0/IO/Zlib.pm line + 566.
Changing fileno($fh) to $fh->fileno results in:
$ perl -MIO::Zlib -e '$fh = IO::Zlib->new("test.gz", "wb"); print $fh- +>fileno' AUTOLOAD(IO::Zlib=GLOB(0x8124538)) IO::Zlib=GLOB(0x8124538) IO::Zlib::fileno main -e 1 AUTOLOAD(IO::Zlib=HASH(0x81e8b3c)) IO::Zlib=HASH(0x81e8b3c) IO::Zlib::ILENO IO::Zlib /usr/lib/perl5/site_perl/5.8.0/IO/Zlib.pm 566 Not a GLOB reference at /usr/lib/perl5/site_perl/5.8.0/IO/Zlib.pm line + 566.
Ick! Where's that "IO::Zlib::ILENO" coming from?

Oh well, that's where I'm at now. I've got to set it down for a bit as I have real paying work to do. :-) Maybe you or someone else would like to pick up there. I'll look deeper later on if no one else nails it.

-sauoq
"My two cents aren't worth a dime.";

In reply to Re: Do Storable and IO::Zlib like to play together? by sauoq
in thread Do Storable and IO::Zlib like to play together? by fokat

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