[Patch] Fix undefined behaviors in regex

[Paolo Carlini]

On 10/17/2013 12:39 AM, Tim Shen wrote:
> On Wed, Oct 16, 2013 at 6:33 PM, Paolo Carlini <paolo.carlini@oracle.com> wrote:
>> By the way, please feel free to prepare a reduced testcase for the
>> -fsanitize people (Marek, Jakub?)
> Here it is.
>
> And we should get undefined behaviors before this commit(r203732).
To be honest, I was thinking something much smaller than the whole 
<regex> ;) But let's add Marek in CC.

Paolo.