Fedora 14 Beta corrupts user data

Bruno Wolff III bruno at wolff.to
Sun Sep 26 17:58:05 UTC 2010

On Sun, Sep 26, 2010 at 10:40:22 -0700,
  John Reiser <jreiser at bitwagon.com> wrote:
> Compiled code for minimum(), maximum(), etc. suffers from a compiler bug:
> https://bugzilla.redhat.com/show_bug.cgi?id=634757    -O1 wrong-code by cmove
> Unfortunately this bug can corrupt user data silently.
> I have hit the bug three times myself (bz 635508, 637303, 637461)
> and consider myself lucky that the bad effects were evident and ignorable.
> A fix is in testing, and a critical path update has been approved:
> https://admin.fedoraproject.org/updates/gcc-4.5.1-4.fc14
> IMNSHO this will require a mass rebuild of all architecture-specific
> .fc14 .rpm.
> Meanwhile, do not use Fedora 14 Beta on data that you value (e-mail,
> documents, database, etc.)  It really is that dangerous.

That's interesting. I just saw an odd regression in the httpd server after
updating from F13 to F14. It affects deflate. The F13 httpd server appears
to be based on the same upstream version, so it seemed odd. I'm adding a
pointer to the gcc issue from my bug report.

Do you know when the gcc bug was introduced?

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