To reliably find what was exported from another package you need to do a little symbol table interrogation e.g
sub find_exported_symbols {
my($in, $from) = @_;
no strict 'refs';
my($in_tbl, $from_tbl) = ( \%{"$in\::"}, \%{"$from\::"} );
return grep {
my $sym = $_;
grep { \*$sym == \*$_ } keys %$from_tbl;
} keys %$in_tbl;
}
use Symbol qw/ gensym qualify delete_package /;
print "found $_ in main from Symbol\n"
for find_exported_symbols( 'main', 'Symbol' );
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