Hi.
I'm unable to launch QtCreator, since it crashes with buffer overflow:
$ qtcreator

• • • buffer overflow detected ***: qtcreator terminated
      ======= Backtrace: =========
      /lib64/libc.so.6(__fortify_fail+0x37)[0x7f3c9d3598c7]
      /lib64/libc.so.6(+0xff6c0)[0x7f3c9d3576c0]
      /lib64/libc.so.6(+0x10187e)[0x7f3c9d35987e]
      /usr/lib64/qt4/libQtCore.so.4(+0x15b364)[0x7f3c9de96364]
      /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so(+0x103232)[0x7f3c8e1dd232]
      /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so(+0x104385)[0x7f3c8e1de385]
      /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so(+0x10083d)[0x7f3c8e1da83d]
      /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so(+0xf2d05)[0x7f3c8e1ccd05]
      /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so(+0xf54af)[0x7f3c8e1cf4af]
      /usr/lib64/qt4/libQtCore.so.4(_ZN11QMetaObject8activateEP7QObjectPKS_iPPv+0x2c9)[0x7f3c9decfd89]
      /usr/lib64/qtcreator/plugins/QtProject/libCore.so(+0x7d016)[0x7f3c91a0f016]
      /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1(_ZN15ExtensionSystem8Internal17PluginSpecPrivate20initializeExtensionsEv+0x92)[0x7f3c9f2761b2]
      /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1(_ZN15ExtensionSystem8Internal20PluginManagerPrivate10loadPluginEPNS_10PluginSpecENS2_5StateE+0x1c1)[0x7f3c9f2707f1]
      /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1(_ZN15ExtensionSystem8Internal20PluginManagerPrivate11loadPluginsEv+0x187)[0x7f3c9f2725f7]
      qtcreator[0x409771]
      /lib64/libc.so.6(__libc_start_main+0xfd)[0x7f3c9d27a4bd]
      qtcreator[0x409a61]
      (memory map follows)

When running under gdb:

#0 0x00007ffff5bdbad5 in raise () from /lib64/libc.so.6
#1 0x00007ffff5bdcf56 in abort () from /lib64/libc.so.6
#2 0x00007ffff5c1bb57 in __libc_message () from /lib64/libc.so.6
#3 0x00007ffff5ca78c7 in __fortify_fail () from /lib64/libc.so.6
#4 0x00007ffff5ca56c0 in __chk_fail () from /lib64/libc.so.6
#5 0x00007ffff5ca787e in __fdelt_warn () from /lib64/libc.so.6
#6 0x00007ffff67e4364 in QProcessPrivate::waitForStarted(int) () from /usr/lib64/qt4/libQtCore.so.4
#7 0x00007fffe6b2b232 in TextEditor::Internal::findFallbackDefinitionsLocation() () from /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so
#8 0x00007fffe6b2c385 in TextEditor::HighlighterSettings::fromSettings(QString const&, QSettings*) () from /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so
#9 0x00007fffe6b2883d in TextEditor::HighlighterSettingsPage::highlighterSettings() const () from /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so
#10 0x00007fffe6b1ad05 in TextEditor::Internal::ManagerProcessor::ManagerProcessor() () from /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so
#11 0x00007fffe6b1d4af in TextEditor::Internal::Manager::registerMimeTypes() () from /usr/lib64/qtcreator/plugins/QtProject/libTextEditor.so
#12 0x00007ffff681dd89 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#13 0x00007fffea35d016 in Core::Internal::MainWindow::extensionsInitialized() () from /usr/lib64/qtcreator/plugins/QtProject/libCore.so
#14 0x00007ffff7bc41b2 in ExtensionSystem::Internal::PluginSpecPrivate::initializeExtensions() () from /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1
#15 0x00007ffff7bbe7f1 in ExtensionSystem::Internal::PluginManagerPrivate::loadPlugin(ExtensionSystem::PluginSpec*, ExtensionSystem::PluginSpec::State) () from /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1
#16 0x00007ffff7bc05f7 in ExtensionSystem::Internal::PluginManagerPrivate::loadPlugins() () from /usr/bin/../lib64/qtcreator/libExtensionSystem.so.1
#17 0x0000000000409771 in main ()

I've tried removing ~/.config/Nokia/qtcreator, no luck.
This may be somehow related to QTCREATORBUG-7943.