Thanks for the replies!

I've just found the cure.

Before that part of the code, I had a sub that initiated the CGI object within itself. For example:

#!/usr/bin/perl -wT

use CGI; my $q = new CGI;

#...

my ( $user_id, $name ) = identify ( $auth_token );

# ...

my $fh = $q->upload( "file" );
my $filesize = -s $fh;
die $filesize; # undef at debugging!
# ... file read routines, that resulted blank after the upgrade
[download]

sub identify {
   my $token = shift;

   # my $q = new CGI; # it started working when I removed this line!

   # identification routines

   # some calls to CGI.pm methods, where I used $q
}
[download]

sub identify {
   my $token = shift;
   my $q = shift; # and including this element on the sub call, of cou
+rse

   my $q = new CGI; # it started working when I removed this line!

   # identification routines

   # some calls to CGI.pm methods, where I used $q
}
[download]

Funny is that it worked with 5.8.7.

Thanks

Andre

Uh, creating a CGI object effectively reads the data from the input. After that, it is gone, when the data is POSTed (as is necessary for file upload) — you may repeat reading parameters from GET.

It's not a matter of garbage collecting, it's a matter of a physical action performed when creating the object. An action that cannot stand being repeated.

That's very clarifying, thanks a lot Bart!

But it is incredible as it worked for years with 5.8.7.
Probably something they were being tolerant with bad code.
I'll watch out for this from now on.

Thanks!

André