This API test fails on WK2. Here is the backtrace: #0 0x00007ffff4b7bac9 in WebCore::SubresourceLoader::didReceiveDataOrBuffer (this=0x8f2530, data=0x8e5498 "<frameset cols=\"25%,75%\">\n <frame src=\"frame_a.html\" name=\"frame_a\">\n <frame src=\"frame_b.html\" name=\"frame_b\">\n</frameset>\n", length=128, prpBuffer=..., encodedDataLength=-1, dataPayloadType=WebCore::DataPayloadBytes) at /home/abrhm/webkit/WebKit/Source/WebCore/loader/SubresourceLoader.cpp:247 #1 0x00007ffff4b7b857 in WebCore::SubresourceLoader::didReceiveData (this=0x8f2530, data=0x8e5498 "<frameset cols=\"25%,75%\">\n <frame src=\"frame_a.html\" name=\"frame_a\">\n <frame src=\"frame_b.html\" name=\"frame_b\">\n</frameset>\n", length=128, encodedDataLength=-1, dataPayloadType=WebCore::DataPayloadBytes) at /home/abrhm/webkit/WebKit/Source/WebCore/loader/SubresourceLoader.cpp:221 #2 0x00007ffff4b72703 in WebCore::ResourceLoader::didReceiveData (this=0x8f2530, data=0x8e5498 "<frameset cols=\"25%,75%\">\n <frame src=\"frame_a.html\" name=\"frame_a\">\n <frame src=\"frame_b.html\" name=\"frame_b\">\n</frameset>\n", length=128, encodedDataLength=-1) at /home/abrhm/webkit/WebKit/Source/WebCore/loader/ResourceLoader.cpp:475 #3 0x00007ffff500d95b in WebCore::QNetworkReplyHandler::forwardData (this=0x67d270) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:679 #4 0x00007ffff500afe5 in WebCore::QNetworkReplyHandlerCallQueue::flush (this=0x67d2a8) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:250 #5 0x00007ffff500ad36 in WebCore::QNetworkReplyHandlerCallQueue::unlock (this=0x67d2a8) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:230 #6 0x00007ffff500b07f in WebCore::QueueLocker::~QueueLocker (this=0x7fffffffc550, __in_chrg=<optimized out>) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:258 #7 0x00007ffff500bbf6 in WebCore::QNetworkReplyWrapper::emitMetaDataChanged (this=0x895e80) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:395 #8 0x00007ffff500b9ac in WebCore::QNetworkReplyWrapper::receiveSniffedMIMEType (this=0x895e80) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp:359 #9 0x00007ffff500e658 in WebCore::QNetworkReplyWrapper::qt_static_metacall (_o=0x895e80, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x7fffffffc710) at .moc/release-shared/moc_QNetworkReplyHandler.cpp:177 #10 0x00007ffff27da0e1 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #11 0x00007ffff583862b in QtMIMETypeSniffer::finished (this=0x8e4fc0) at .moc/release-shared/moc_QtMIMETypeSniffer.cpp:130 #12 0x00007ffff500a078 in QtMIMETypeSniffer::trySniffing (this=0x8e4fc0) at /home/abrhm/webkit/WebKit/Source/WebCore/platform/network/qt/QtMIMETypeSniffer.cpp:65 #13 0x00007ffff583848f in QtMIMETypeSniffer::qt_static_metacall (_o=0x8e4fc0, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffc900) at .moc/release-shared/moc_QtMIMETypeSniffer.cpp:75 #14 0x00007ffff27da0e1 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #15 0x00007ffff27db73e in QObject::event(QEvent*) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #16 0x00007ffff35051f4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Widgets.so.5 #17 0x00007ffff35085d1 in QApplication::notify(QObject*, QEvent*) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Widgets.so.5 #18 0x00007ffff27b4a24 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #19 0x00007ffff27b6961 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #20 0x00007ffff27fc1f3 in ?? () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #21 0x00007fffef545d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007fffef5460a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007fffef546164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007ffff27fc634 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #25 0x00007ffff27b4e2c in QCoreApplication::processEvents(QFlags<QEventLoop::ProcessEventsFlag>, int) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #26 0x00000000004056a2 in QTest::qWait (ms=0) at /usr/local/Trolltech/Qt5/Qt-5.0.1/include/QtTest/qtestsystem.h:68 #27 0x0000000000408979 in tst_QWebView::crashTests (this=0x7fffffffdf50) at /home/abrhm/webkit/WebKit/Source/WebKit/qt/tests/qwebview/tst_qwebview.cpp:204 #28 0x000000000040b88f in tst_QWebView::qt_static_metacall (_o=0x7fffffffdf50, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0x7fffffffd470) at .moc/release-shared/tst_qwebview.moc:125 #29 0x00007ffff27bd19b in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) cons---Type <return> to continue, or q <return> to quit--- t () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #30 0x00007ffff27c082e in QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Core.so.5 #31 0x00007ffff31b4e5a in ?? () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Test.so.5 #32 0x00007ffff31b5bdc in QTest::qExec(QObject*, int, char**) () from /usr/local/Trolltech/Qt5/Qt-5.0.1/lib/libQt5Test.so.5 #33 0x000000000040b753 in main (argc=1, argv=0x7fffffffe058) at /home/abrhm/webkit/WebKit/Source/WebKit/qt/tests/qwebview/tst_qwebview.cpp:521 Could you check it please?