This bug is to track the Math::BigInt::GMP part of the following issue:
[perl #41192] numify of BigInt overflows incorrectly
http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2007-01/msg00172.html
For example, the following code should return a Perl scalar numerical
infinity, but prints a Perl scalar string:
$ perl -MMath::BigInt=lib,GMP -lwe 'print Math::BigInt -> new("1e1000")
-> numify'
100000000000000000000000(...)