kbuildsycoca5 crashing

[Jeremy Whiting]

\o/ KService built with a downgraded (4.9.1) g++ works fine. Sorry for
the noise. Should be able to detect this sort of problem quickly in
the future though. I'll stick with non testing arch for the time
being.

On Sun, May 10, 2015 at 10:07 AM, Jeremy Whiting <jpwhiting at kde.org> wrote:
> I only built kf5/kde applications. Though I've no idea what compiler
> was used to build the Qt packages. probably g++ 4.9 from arch stable I
> bet. /me removes testing, downgrades the dozen packages from it and
> will rebuild. Thanks for the tips both of you. Hopefully I can finish
> the 15.04.1 release tuesday from within a plasma 5 session instead of
> this fallback gnome session :) (and have konversation running again
> also...)
>
> thanks,
> Jeremy
>
> On Sun, May 10, 2015 at 9:46 AM, Albert Astals Cid <aacid at kde.org> wrote:
>> El Diumenge, 10 de maig de 2015, a les 08:57:28, Jeremy Whiting va escriure:
>>> Also, none of the recent patches on
>>> https://projects.archlinux.org/svntogit/packages.git/log/trunk?h=packages/qt
>>> 5 make me nervous, all seem to be pretty straightforward. Could it be lower
>>> level as in my glibc is too new, or the compiler itself (GCC 5.1.0)
>>
>> I hear nothing else than scary stories about people mixing stuff compiled with
>> the new gcc and older versions, there's supposedly a switch that makes the abi
>> be compatible, but the switch seems to be failing at properly make things
>> compatible.
>>
>> I'd suggest to either recompile everything or to downgrade to old gcc.
>>
>> Cheers,
>>   Albert
>>
>>>
>>> On Sun, May 10, 2015 at 8:54 AM, Jeremy Whiting <jpwhiting at kde.org> wrote:
>>> > I see. Some kde applications segfault (klettres, okular) other's run
>>> > ok (dolphin, khangman) I haven't tried others. As for qt binaries I
>>> > checked the binaries that come with the arch package, and assistant,
>>> > designer, qdbusviewer all work fine. Is there one in particular I
>>> > should check?
>>> >
>>> > On Sun, May 10, 2015 at 8:45 AM, David Faure <faure at kde.org> wrote:
>>> >> On Sunday 10 May 2015 08:24:48 Jeremy Whiting wrote:
>>> >>> Rebuilt kservice (and nuked my build folder and /usr/local just to be
>>> >>> doubly sure.) kbuildsycoca5 still crashes with this same backtrace, no
>>> >>> idea why. Could it be a bug in QtCore? Arch testing packages of Qt?
>>> >>
>>> >> I doubt it. More likely a compiler bug or a BIC or a miscompile.
>>> >>
>>> >> Try running a few Qt examples from your Qt build, to at least make sure
>>> >> that works.
>>> >>
>>> >>> 0xffffffff is -1, no? did it get decreased one too many times somehow?
>>> >>
>>> >> You don't understand. This isn't the value of the refcount, it's the
>>> >> address in memory of the variable holding the refcount.
>>> >>
>>> >> Which means a serious mixup somewhere lowlevel (e.g. compiler).
>>> >>
>>> >> --
>>> >> David Faure, faure at kde.org, http://www.davidfaure.fr
>>> >> Working on KDE Frameworks 5
>>>
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>>