If you are on winodows then this is a known bug in the XS implementation. The solution is simple.

$Data::Dumper::Useqq=1;
[download]

Which forces the use of the perl implementation which does not suffer the problem. For smaller dump sizes you will notice a performance penalty. For larger dump sizes you will notice that the dump actually finishes and does not run out fo memory. ;-)

--- demerphq
my friends call me, usually because I'm late....