Version-Release number of selected component:
webkitgtk4-2.10.0-1.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/libexec/webkit2gtk-4.0/WebKitWebProcess 20
crash_function: __memcpy_sse2_unaligned
executable:     /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
global_pid:     9337
kernel:         4.2.0-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 __memcpy_sse2_unaligned at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:36
 #1 IPC::ArgumentDecoder::ArgumentDecoder at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/ArgumentDecoder.cpp:41
 #2 IPC::MessageDecoder::MessageDecoder at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/MessageDecoder.cpp:49
 #3 std::make_unique<IPC::MessageDecoder, IPC::DataReference, WTF::Vector<IPC::Attachment, 0ul, WTF::CrashOnOverflow, 16ul> >(IPC::DataReference&&, WTF::Vector<IPC::Attachment, 0ul, WTF::CrashOnOverflow, 16ul>&&) at /usr/src/debug/webkitgtk-2.10.0/Source/WTF/wtf/StdLibExtras.h:327
 #4 IPC::Connection::processMessage at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/unix/ConnectionUnix.cpp:246
 #5 IPC::Connection::readyReadHandler at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/unix/ConnectionUnix.cpp:356
 #6 std::function<void ()>::operator()() const at /usr/include/c++/5.1.1/functional:2271
 #7 WTF::WorkQueue::<lambda(GIOCondition)>::operator() at /usr/src/debug/webkitgtk-2.10.0/Source/WTF/wtf/glib/WorkQueueGLib.cpp:98
 #8 std::_Function_handler<bool(GIOCondition), WTF::WorkQueue::registerSocketEventHandler(int, std::function<void()>, std::function<void()>)::<lambda(GIOCondition)> >::_M_invoke(const std::_Any_data &, <unknown type in /usr/lib/debug/usr/lib64/libjavascriptcoregtk-4.0.so.18.2.8.debug, CU 0xf107ac8, DIE 0xf10a682>) at /usr/include/c++/5.1.1/functional:1857
 #9 std::function<bool (GIOCondition)>::operator()(GIOCondition) const at /usr/include/c++/5.1.1/functional:2271