Description of problem:
I closed gitg.

Version-Release number of selected component:
webkitgtk4-2.10.3-1.fc23

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/libexec/webkit2gtk-4.0/WebKitWebProcess 51
crash_function: g_task_return_error
executable:     /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
kernel:         4.2.5-300.fc23.x86_64
runlevel:       N 5
type:           CCpp

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_task_return_error at gtask.c:1699
 #1 g_task_return_new_error at gtask.c:1738
 #2 WebKit::CustomProtocolManagerImpl::didFailWithError(unsigned long, WebCore::ResourceError const&) at /usr/src/debug/webkitgtk-2.10.3/Source/WebKit2/Shared/Network/CustomProtocols/soup/CustomProtocolManagerImpl.cpp:122
 #3 WebKit::CustomProtocolManager::didFailWithError(unsigned long, WebCore::ResourceError const&) at /usr/src/debug/webkitgtk-2.10.3/Source/WebKit2/Shared/Network/CustomProtocols/soup/CustomProtocolManagerSoup.cpp:91
 #4 WebKit::CustomProtocolManager::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) at /usr/src/debug/webkitgtk-2.10.3/Source/WebKit2/Platform/IPC/HandleMessage.h:16
 #8 IPC::Connection::dispatchWorkQueueMessageReceiverMessage(IPC::Connection::WorkQueueMessageReceiver&, IPC::MessageDecoder&) at /usr/src/debug/webkitgtk-2.10.3/Source/WebKit2/Platform/IPC/Connection.cpp:277
 #9 std::_Function_handler<void(), IPC::Connection::processIncomingMessage(std::unique_ptr<IPC::MessageDecoder>)::<lambda()> >::_M_invoke(const std::_Any_data &) at /usr/src/debug/webkitgtk-2.10.3/Source/WebKit2/Platform/IPC/Connection.cpp:661
 #11 WTF::GMainLoopSource::voidCallback() at /usr/include/c++/5.1.1/functional:2271
 #13 WTF::GMainLoopSource::voidSourceCallback(WTF::GMainLoopSource*) at /usr/src/debug/webkitgtk-2.10.3/Source/WTF/wtf/glib/GMainLoopSource.cpp:456
 #18 WTF::threadEntryPoint(void*) at /usr/include/c++/5.1.1/functional:2271