perl -Mbigrat -e 'sqrt 2' crashed

[ntysdd]

$LANG=
$perl -Mbigrat -e 'sqrt 2'
>Segmentation fault

$perl -v
>
>This is perl, v5.10.1 (*) built for i686-linux-gnu-thread-multi
>(with 40 registered patches, see perl -V for more detail)
>
>Copyright 1987-2009, Larry Wall
>
>Perl may be copied only under the terms of either the Artistic License or the
>GNU General Public License, which may be found in the Perl 5 source kit.
>
>Complete documentation for Perl, including FAQ lists, should be found on
>this system using "man perl" or "perldoc perl". If you have access to the
>Internet, point your browser at http://www.perl.org/, the Perl Home Page.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: perl 5.10.1-12ubuntu2.1
ProcVersionSignature: Ubuntu 2.6.35-32.65-generic 2.6.35.14
Uname: Linux 2.6.35-32-generic i686
NonfreeKernelModules: fglrx wl
Architecture: i386
Date: Sat Feb 18 17:49:14 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANGUAGE=zh_CN:en
 PATH=(custom, user)
 LANG=zh_CN.utf8
 SHELL=/bin/bash
SourcePackage: perl