use warnings;
chdir 't' if -d 't';
-require q(./test.pl); plan(tests => 6);
+require q(./test.pl); plan(tests => 7);
+
+require mro;
{
package Foo;
delete $::{"Foo::"};
is(mro::get_pkg_gen('Foo'), 0, 'pkg_gen 0 for delete $::{Pkg::}');
+
+delete $::{"Quux::"};
+push @Quux::ISA, "Woot"; # should not segfault
+ok(1, "No segfault on modification of ISA in a deleted stash");