https://bugs.kde.org/show_bug.cgi?id=371491

--- Comment #3 from Michael Daniels <mdani...@blackberry.com> ---
The testing that I had done, which I realize I was not made clear in the
description, was specific to our OS (QNX Neutrino). Our kernel is putting the
per-cpu data above the 4GB boundary and sets the fs base address to that value.
Since the fs base address is always over 4GB, I can reproduce the behaviour
quite easily locally.

I thought of different ways this might be testable, but to my knowledge fs is
not writable in user-mode / valgrind and at least for Linux it looks like it's
0. So I am not aware of a reliable / portable way to force fs + 32bit addr over
4GB to validate the truncation.

I am open to suggestions if anyone else has ideas.

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