[Webkit-unassigned] [Bug 32704] Crash with QWebPluginFactory and Acrobat Reader plugin

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32704





--- Comment #2 from Pierre <pinaraf at pinaraf.info>  2009-12-18 06:33:22 PST ---
Well, the problem is much more generic.
When a NPAPI plugin registers itself for a mime type, this mime type will no
longer be considered a unsupported content, so WebKit will always try to open
it itself. It'll call the plugin to render this content.
But when a QWebPluginFactory takes over, then trouble begins. It looks like
QWebPluginFactory's plugins can't be used this way, they have to be embedded
inside a web page, thus the crashes.
You can get this problem on linux too using the flash plugin : just replace
http://www.google.fr with the URL of a flash video directly in the source code
of the test case, and it'll crash.

Here is the backtrace :
#0  0x00007ffff778fab0 in typeinfo name for WebCore::QtPluginWidget () from
/usr/lib/libQtWebKit.so.4
#1  0x00007ffff729c89e in WebCore::FrameLoaderClientQt::committedLoad
(this=0x6db2e0, loader=0x7fffeb8e5080, data=0x75d088 "FWS\005\271\n",
length=1067)
    at ../WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp:697
#2  0x00007ffff709f02d in WebCore::DocumentLoader::commitLoad
(this=0x7fffeb8e5080, data=0x75d088 "FWS\005\271\n", length=1067) at
loader/DocumentLoader.cpp:342
#3  0x00007ffff70dd3e9 in WebCore::ResourceLoader::didReceiveData
(this=0x7fffeb90a680, data=0x75d088 "FWS\005\271\n", length=1067,
lengthReceived=1067, allAtOnce=120) at loader/ResourceLoader.cpp:248
#4  0x00007ffff70ceacc in WebCore::MainResourceLoader::didReceiveData
(this=0x7fffeb90a680, data=0x75d088 "FWS\005\271\n", length=1067,
lengthReceived=1067, allAtOnce=<value optimized out>)
    at loader/MainResourceLoader.cpp:374
#5  0x00007ffff727ce9c in WebCore::QNetworkReplyHandler::forwardData
(this=0x6d0c10) at platform/network/qt/QNetworkReplyHandler.cpp:360
#6  0x00007ffff727e598 in WebCore::QNetworkReplyHandler::qt_metacall
(this=0x6d0c10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>,
_a=<value optimized out>)
    at .moc/release-shared/moc_QNetworkReplyHandler.cpp:84
#7  0x00007ffff59f3d38 in QObject::event(QEvent*) () from
/usr/lib/libQtCore.so.4
#8  0x00007ffff5ef508d in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/libQtGui.so.4
#9  0x00007ffff5efb3bd in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/libQtGui.so.4
#10 0x00007ffff59e3bdc in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/libQtCore.so.4
#11 0x00007ffff59e4abc in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib/libQtCore.so.4
#12 0x00007ffff5a0db23 in ?? () from /usr/lib/libQtCore.so.4
#13 0x00007ffff30a713a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#14 0x00007ffff30aa998 in ?? () from /lib/libglib-2.0.so.0
#15 0x00007ffff30aab4c in g_main_context_iteration () from
/lib/libglib-2.0.so.0
#16 0x00007ffff5a0d68c in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQtCore.so.4
#17 0x00007ffff5fa553f in ?? () from /usr/lib/libQtGui.so.4
#18 0x00007ffff59e24c2 in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQtCore.so.4
#19 0x00007ffff59e2894 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQtCore.so.4
#20 0x00007ffff59e4d46 in QCoreApplication::exec() () from
/usr/lib/libQtCore.so.4
#21 0x0000000000402444 in main (argc=1, argv=0x7fffffffe288) at main.cpp:54

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