BEWARE: a problematic glibc made it to stable (F16)

[Jim Meyering]

Jim Meyering wrote:
> Adam Williamson wrote:
>> ... The only breakage
>> in one which was approved was to do with compiling things - which, sure,
>> is a pain in the ass, but it's not the kind of problem critpath was
>> introduced to deal with in the first place.
>
> The problem is bigger than it first seemed, and still not fixed.
>
> True, I noticed the problem initially when running a just-built git,
> but in fact the distributed /usr/bin/git demonstrates precisely the
> same heap corruption as the one I built.  See the further discussion
> on http://bugzilla.redhat.com/747377
>
> The underlying bug seems pthread-related.
> When I make git grep run without using threads there is no problem.
>
> To demonstrate the problem, run this on a multi-core system, in a
> clone of a decent-sized git repository like git's own:
>
>     for i in $(seq 100);do echo $i; timeout 1 ./git grep -q stat;done

Oops.  Drop the "./", of course, to test /usr/bin/grep:

     for i in $(seq 100);do echo $i; timeout 1 git grep -q stat;done