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On Wed, 2011-06-29 at 21:09 +0800, Dexuan Cui wrote:
> +This turned out to be a gcc's bug. See
> +https://bugs.gentoo.org/show_bug.cgi?id=360513
> +http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39333
> +
> +Upstream gcc seems uninterested in the bug, so at present we can disable the
> +option as a workaround. Thanks Ryan Hill for the investigation and the
> +workaround patch.

I'm not sure it's fair to say that upstream gcc is uninterested.  It
doesn't appear that anybody has been willing or able to produce a
testcase which will allow the gcc people to debug the problem. 

p.