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List: kde-bugs-dist
Subject: [Bug 294534] Plasma crashes when I plugin external HDD and more
From: Fabio Erculiani <lxnay () sabayon ! org>
Date: 2012-03-11 11:06:51
Message-ID: bug-294534-17878-IF2EEMaSCs () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=294534
--- Comment #32 from Fabio Erculiani <lxnay@sabayon.org> ---
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?
Compiling with plain "-O2 -march=x86-64" fixed the issue downstream then.
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