$ perl -d ./hist2rss.pl

Loading DB routines from perl5db.pl version 1.23
Editor support available.

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

main::(./hist2rss.pl:15):       my $db = new MyApp::DB;
  DB<1> c
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x88044c0 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c47508 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c62818 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c62174 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c629f8 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c62b00 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c650d8 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c65294 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c65c6c at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c66c24 at /home/user/lib/modules/Class/DBI.pm line 1127.
hist2rss.pl: Attempt to free unreferenced scalar: SV 0x8c65ec4 at /home/user/lib/modules/Class/DBI.pm line 1127.
Debugged program terminated.  Use q to quit or R to restart,
  use O inhibit_exit to avoid stopping after program termination,
  h q, h R or h O to get additional info.  
  DB<1> exit