package My::Package::Version;

use strict;
use vars qw(@ISA @EXPORT $VERSION);

use Exporter;
@ISA = qw(Exporter);
@EXPORT = qw($VERSION);
$VERSION = 3.14;

sub import {
  my $i = 0;
  my $pkg = caller(0);
  print "Import Caller Trace:\n";
  while($pkg) {
    print "  Called from package $pkg\n";

    # Note that these tests have been moved from the
    # loop condition to inside the loop so the loop
    # will not terminate if it fails.
    if($pkg =~ /^My::Package::/ and not defined ${"$pkg\::VERSION"}) {
      print "    (Exporting VERSION to $pkg)\n";
      __PACKAGE__->export_to_level($i+1);
    }
    $pkg = caller(++$i);
  }
}