[Bug 705689] Re: unity-2d-launcher crashes with segfault error on armel (natty only)

[Jani Monoses]

The unity-2d-launcher crash can be reproduced with a locally built Qt, however the app I pasted in comment #9 works.
I built Qt with regular system libs and not in a chroot so maybe there's a slight difference.

As seen for the sample app, if I built Qt with either g++ or gcc
4.4(there are both C++ and C files in the source) the crash is similar,
so I don't think this is a compiler regression.

The bug occurs when accessing a volatile int member of a struct via an
int() operator defined on that class and which simply returns the value.

QBasicAtomicInt class in this file
http://qt.gitorious.org/qt/qt/blobs/4.7/src/corelib/thread/qbasicatomic.h

The two crashes I have seen both access that field from within the macro Q_DECLARE_METATYPE at line 265 in
http://qt.gitorious.org/qt/qt/blobs/4.7/src/corelib/kernel/qmetatype.h

That macro is used to define GestureState metatype, the one seen in the
stacktraces above.

I'll try to check whether https://bugs.launchpad.net/gcc-
linaro/+bug/675347 is related.

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https://bugs.launchpad.net/bugs/705689

Title:
  unity-2d-launcher crashes with segfault error on armel (natty only)