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List:       kdelibs-bugs
Subject:    [Bug 305718] Several applications crash in QtScript initialization [@__memcpy_sse2, QTJSC::JIT::priv
From:       Andrew Munkres <amunkres () nyx ! net>
Date:       2012-09-23 1:25:08
Message-ID: bug-305718-90985-05hodNgBGF () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=305718

Andrew Munkres <amunkres@nyx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amunkres@nyx.net

--- Comment #27 from Andrew Munkres <amunkres@nyx.net> ---
Now that Qt 4.8.3 (the first upstream Qt version to include this patch) is in
Arch Linux, the problem occurs there too. For me, it caused both plasma-desktop
and kwin to segfault on startup, thus making KDE almost unusable. (As a
temporary measure to prevent these from crashing, I reverted to Qt 4.8.2.)
https://bugs.archlinux.org/task/31654

There's also an Ubuntu bug report which looks it it might be caused by this
patch:
https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/1045755

This patch actually appears to have originated 2 years ago in the upstream
WebKit SVN repository:
http://trac.webkit.org/changeset/62799
https://bugs.webkit.org/show_bug.cgi?id=41641
But it wasn't until August this year that it migrated from WebKit's
JavaScriptCore to the copy of JavaScriptCore in the QtScript module of Qt:
http://qt.gitorious.org/qt/qtscript/commit/79ebd39d0d4846cb911ae122d2059e5add568d7e
http://qt.gitorious.org/qt/qt/commit/ada98493bbfbd9af0d0b593017e29d39bcd3495e
https://bugreports.qt-project.org/browse/QTBUG-23871

Maybe it would be worth reporting the problem to the upstream WebKit
developers?

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