https://bugs.kde.org/show_bug.cgi?id=398086

--- Comment #4 from Rhys Kidd <rhysk...@gmail.com> ---
(In reply to Julian Seward from comment #3)
> It didn't actually print the undecodeable bytes, as it normally does in
> such cases.  So I'd guess the "failing" insn is ud2 for which I think we
> indeed don't print the failing bytes.  If I had to guess I'd say it is
> libdispatch.dylib's way of throwing a fatal assertion failure following
> the syscall failures, which it presumably can't recover from.

Makes sense. I recall seeing something similar before in another occasion where
valgrind didn't provide support for a mach syscall, and a 'ud2' error was hit
shortly thereafter.

I'll leave this bug open for now, but suspect it will be addressed by the
eventual fix for bz#383199 which provides unix:463 (openat) support.

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