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List:       kde-bugs-dist
Subject:    [Bug 294534] Plasma crashes when I plugin external HDD and more
From:       Jacopo De Simoi <wilderkde () gmail ! com>
Date:       2012-03-11 14:27:10
Message-ID: bug-294534-17878-lCS3Lgvq8f () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=294534

--- Comment #34 from Jacopo De Simoi <wilderkde@gmail.com> ---
(In reply to comment #32)
> So I made a nice discovery.
> We were compiling the Qt4 stack with GCC 4.6 and Graphite +
> -ftree-vectorize, as sown in the CFLAGS variable in make.conf.amd64 file
> linked above.
> Disabling Graphite and -ftree-vectorize fixed all these segfaults.
> 
> Perhaps it's about instruction reordering (due to strict-aliasing) or
> missing volatiles?
Excellent find, please report this issue upstream!
> 
> Compiling with plain "-O2 -march=x86-64" fixed the issue downstream then.

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