[BUG] t/op/stash.t causing core dump

This is for blead under Cygwin on Windows.  While it looks like the
test passes, here's the output:

t/op/stash....................................................sh: line
26: 21868 Segmentation fault      (core dumped)
/c/_/perl_tmp/38064/perl-current/perl.exe "-I../lib" -MB -l -e '
                my $sub = do {
                    package four;
                    sub { 1 };
                };
                %four:: = ();

                my $gv = B::svref_2object($sub)->GV;
                print $gv->isa(q/B::GV/) ? q/ok/ : q/not ok/;

                my $st = eval { $gv->STASH->NAME };
                print $st eq q/__ANON__/ ? q/ok/ : q/not ok/;

                my $sub = do {
                    package five;
                    sub { 1 };
                };
                undef %five::;

                $gv = B::svref_2object($sub)->GV;
                print $gv->isa(q/B::GV/) ? q/ok/ : q/not ok/;

                $st = eval { $gv->STASH->NAME };
                print $st eq q/__ANON__/ ? q/ok/ : q/not ok/;

                print q/done/;
            ' 2>&1
ok

• [BUG] t/op/stash.t causing core dump by Jerry D. Hedden
• Re: [BUG] t/op/stash.t causing core dump by Jerry D. Hedden