Unable to debug perl 5.8.0 program

[Andrew DeFaria]

Recently I started receiving the following error when trying to user 
perl -d. It only seems to happen with some perl scripts and not other, 
more simple perl scripts:

$ perl -d CheckinPreop.pl

Loading DB routines from perl5db.pl version 1.19
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(CheckinPreop.pl:42):     my $site;
Unable to get Terminal Size. The TIOCGWINSZ ioctl didn't work. The 
COLUMNS and LINES environment variables didn't work. The resize program 
didn't work. at 
/usr/lib/perl5/site_perl/5.8.0/cygwin-multi-64int/Term/ReadKey.pm line 343.
Compilation failed in require at 
/usr/lib/perl5/site_perl/5.8.0/Term/ReadLine/Perl.pm line 58.
        
Term::ReadLine::Perl::new('Term::ReadLine','perldb','GLOB(0x10164648)','GLOB(0x1014a8e8)') 
called at /usr/lib/perl5/5.8.0/perl5db.pl line 2225
        DB::setterm called at /usr/lib/perl5/5.8.0/perl5db.pl line 773
        DB::DB called at CheckinPreop.pl line 42
cqc::CODE(0x10279bdc)(//sons-clearcase/Views/official/Tools/lib/cqc.pm:101):
101:        Disconnect;
  DB<1> q
$ echo -e "Lines: $LINES\nColumns: $COLUMNS"
Lines: 24
Columns: 80

This happens in an rxvt window as well as a Windows console window.

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