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 17
crash_function: WebKit::CustomProtocolManagerImpl::didReceiveResponse
executable:     /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
global_pid:     13775
kernel:         4.2.3-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WebKit::CustomProtocolManagerImpl::didReceiveResponse at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Shared/Network/CustomProtocols/soup/CustomProtocolManagerImpl.cpp:176
 #1 IPC::callMemberFunctionImpl<WebKit::CustomProtocolManager, void (WebKit::CustomProtocolManager::*)(unsigned long, WebCore::ResourceResponse const&, unsigned int), std::tuple<unsigned long, WebCore::ResourceResponse, unsigned int>, 0ul, 1ul, 2ul>(WebKit::CustomProtocolManager*, void (WebKit::CustomProtocolManager::*)(unsigned long, WebCore::ResourceResponse const&, unsigned int), std::tuple<unsigned long, WebCore::ResourceResponse, unsigned int>&&, std::index_sequence<0ul, 1ul, 2ul>) at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/HandleMessage.h:16
 #2 IPC::callMemberFunction<WebKit::CustomProtocolManager, void (WebKit::CustomProtocolManager::*)(unsigned long, WebCore::ResourceResponse const&, unsigned int), std::tuple<unsigned long, WebCore::ResourceResponse, unsigned int>, std::make_index_sequence<3ul> >(std::tuple<unsigned long, WebCore::ResourceResponse, unsigned int>&&, WebKit::CustomProtocolManager*, void (WebKit::CustomProtocolManager::*)(unsigned long, WebCore::ResourceResponse const&, unsigned int)) at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/HandleMessage.h:22
 #3 IPC::handleMessage<Messages::CustomProtocolManager::DidReceiveResponse, WebKit::CustomProtocolManager, void (WebKit::CustomProtocolManager::*)(unsigned long, WebCore::ResourceResponse const&, unsigned int)> at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/HandleMessage.h:92
 #4 WebKit::CustomProtocolManager::didReceiveMessage at /usr/src/debug/webkitgtk-2.10.0/x86_64-redhat-linux-gnu/DerivedSources/WebKit2/CustomProtocolManagerMessageReceiver.cpp:52
 #5 IPC::Connection::dispatchWorkQueueMessageReceiverMessage at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/Connection.cpp:277
 #6 IPC::Connection::<lambda()>::operator() at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/Connection.cpp:661
 #7 std::_Function_handler<void(), IPC::Connection::processIncomingMessage(std::unique_ptr<IPC::MessageDecoder>)::<lambda()> >::_M_invoke(const std::_Any_data &) at /usr/include/c++/5.1.1/functional:1871
 #8 std::function<void ()>::operator()() const at /usr/include/c++/5.1.1/functional:2271
 #9 WTF::GMainLoopSource::voidCallback at /usr/src/debug/webkitgtk-2.10.0/Source/WTF/wtf/glib/GMainLoopSource.cpp:365