$ ./perl -Ilib -d Porting/sync-with-cpan ExtUtils::Install

Loading DB routines from perl5db.pl version 1.57
Editor support available.

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

Maintainers::(Porting/sync-with-cpan:144):
144:	$| = 1;
  DB<1> c 322
Maintainers::(Porting/sync-with-cpan:322):
322:	if (defined $tarball) {
  DB<2> x $tarball
Died at lib/perl5db.pl line 6391.
 at lib/perl5db.pl line 6391.
	DB::dumpit(GLOB(0x5621e73333c0), ARRAY(0x5621e836bc78)) called at lib/perl5db.pl line 767
	DB::eval called at lib/perl5db.pl line 3138
	DB::DB called at Porting/sync-with-cpan line 322
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.