Strange syntax error when asserting version

version.pl

use strict;                                                                                                                                                                          
use warnings;
use Devel::Peek;
Dump $_ for .96, 0.96;

# this is fine
eval "use Data::Dumper 0.01 'Dumper'";
my $error = $@ || "none";
print "\nError is: $error\n";

print "---------------------------\n";

# this is a syntax error
eval "use Data::Dumper .01 'Dumper'";
$error = $@ || "none";
print "\nError is: $error\n";