Details
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Bug
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Resolution: Fixed
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P2: Important
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None
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6.6.0
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None
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C++ tested on GNU+Linux, Python tested on Windows
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All
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50833718f (112-based)
Description
Steps to reproduce:
- Get "simplebrowser" example code for Python/C++ (https://doc.qt.io/qtforpython-6/examples/example_webenginewidgets_simplebrowser.html or https://doc.qt.io/qt-6/qtwebengine-webenginewidgets-simplebrowser-example.html )
- Compile the program if C++
- Run program, navigate to https://outlook.com , sign in
- Try to open any message in new window (double click on a message in your Inbox)
The program will freeze and exit on Python (with return code 0xC0000005 (STATUS_ACCESS_VIOLATION) on Windows). On GNU+Linux and C++, it will segfault.
Here is a gdb backtrace from the crash on C++ and GNU+Linux, provided by The-Compiler (qutebrowser maintainer) on IRC:
Thread 1 "simplebrowser" received signal SIGSEGV, Segmentation fault. 0x00007ffff0aef1cf in content::WebContentsImpl::DidInferColorScheme () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:6147 Downloading source file /usr/src/debug/qt6-webengine/build/src/core/RelWithDebInfo/x86_64/../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc 6147 if (web_preferences_->preferred_color_scheme == (gdb) bt #0 0x00007ffff0aef1cf in content::WebContentsImpl::DidInferColorScheme(content::PageImpl&) () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:6147 #1 content::WebContentsImpl::DidInferColorScheme(content::PageImpl&) () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:6136 #2 0x00007fffefe1a98f in blink::mojom::LocalFrameHostStubDispatch::Accept(blink::mojom::LocalFrameHost*, mojo::Message*) () at /usr/lib/libQt6WebEngineCore.so.6 #3 0x00007ffff21302a3 in mojo::InterfaceEndpointClient::HandleValidatedMessage(mojo::Message*) () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:1000 #4 0x00007ffff2131307 in mojo::MessageDispatcher::Accept(mojo::Message*) () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/message_dispatcher.cc:48 #5 0x00007ffff212fcce in mojo::InterfaceEndpointClient::HandleIncomingMessage(mojo::Message*) () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:694 #6 0x00007ffff2389402 in AcceptOnEndpointThread() () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/ipc/ipc_mojo_bootstrap.cc:1075 #7 0x00007ffff23860e9 in Invoke<void (IPC::(anonymous namespace)::ChannelAssociatedGroupController::*)(mojo::Message), scoped_refptr<IPC::(anonymous namespace)::ChannelAssociatedGroupController>, mojo::Message> () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/functional/bind_internal.h:764 #8 MakeItSo<void (IPC::(anonymous namespace)::ChannelAssociatedGroupController::*)(mojo::Message), std::tuple<scoped_refptr<IPC::(anonymous namespace)::ChannelAssociatedGroupController>, mojo::Message> > () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/functional/bind_internal.h:943 #9 RunImpl<void (IPC::(anonymous namespace)::ChannelAssociatedGroupController::*)(mojo::Message), std::tuple<scoped_refptr<IPC::(anonymous namespace)::ChannelAssociatedGroupController>, mojo::Message>, 0, 1> () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/functional/bind_internal.h:1038 #10 RunOnce() () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/functional/bind_internal.h:989 #11 0x00007ffff18f0d1e in base::OnceCallback<void ()>::Run() && () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/functional/callback.h:152 #12 base::TaskAnnotator::RunTaskImpl(base::PendingTask&) () at ./../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/task/common/task_annotator.cc:162 #13 0x00007ffff1909819 in RunTask<base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl(base::LazyNow*)::<lambda(perfetto::EventContext&)> > () at ../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/task/common/task_annotator.h:88 #14 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl(base::LazyNow*) () at ./../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:490 #15 0x00007ffff190a266 in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWork() () at ./../../../../../qtwebengine-everywhere-src-6.6.0/src/3rdparty/chromium/base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:340 #16 0x00007fffedd50192 in QtWebEngineCore::MessagePumpForUIQt::handleScheduledWork() () at /usr/src/debug/qt6-webengine/qtwebengine-everywhere-src-6.6.0/src/core/browser_main_parts_qt.cpp:197 #17 0x00007fffeb5a4fe6 in QObject::event(QEvent*) (this=0x55555595b6d0, e=0x7fff28049290) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qobject.cpp:1414 #18 0x00007ffff777318b in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55555595b6d0, e=0x7fff28049290) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/widgets/kernel/qapplication.cpp:3290 #19 0x00007fffeb5626d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55555595b6d0, event=event@entry=0x7fff28049290) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qcoreapplication.cpp:1118 #20 0x00007fffeb562a5b in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x7fff28049290, receiver=<optimized out>) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qcoreapplication.cpp:1536 #21 QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x5555555e0ac0) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qcoreapplication.cpp:1898 #22 0x00007fffeb799d24 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=0x0, event_type=0) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qcoreapplication.cpp:1757 #23 postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x555555643bc0) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qeventdispatcher_glib.cpp:243 #24 0x00007fffea50df69 in g_main_dispatch (context=0x7fffd0000ef0) at ../glib/glib/gmain.c:3476 #25 0x00007fffea56c327 in g_main_context_dispatch_unlocked (context=0x7fffd0000ef0) at ../glib/glib/gmain.c:4284 #26 g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x7fffd0000ef0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4349 #27 0x00007fffea50c162 in g_main_context_iteration (context=0x7fffd0000ef0, may_block=1) at ../glib/glib/gmain.c:4414 #28 0x00007fffeb797934 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55555563bc90, flags=...) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qeventdispatcher_glib.cpp:393 #29 0x00007fffeb56cc5e in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=..., this=0x7fffffffc850) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qeventloop.cpp:100 #30 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fffffffc850, flags=...) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/kernel/qeventloop.cpp:182 #31 0x00007fffeb565178 in QCoreApplication::exec() () at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.0/src/corelib/global/qflags.h:74 #32 0x0000555555565f2d in main () (gdb)
If I understand the trace right, there is no default web_preferences_ struct or class instance defined, and it seems to be pointing to nullptr..?