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 18
crash_function: std::__throw_bad_function_call
executable:     /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
global_pid:     2609
kernel:         4.2.1-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #6 std::__throw_bad_function_call at ../../../../../libstdc++-v3/src/c++11/functexcept.cc:139
 #7 std::function<void (WebCore::PolicyAction)>::operator()(WebCore::PolicyAction) const at /usr/include/c++/5.1.1/functional:2270
 #8 WebKit::WebFrameLoaderClient::dispatchDecidePolicyForNavigationAction(WebCore::NavigationAction const&, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, std::function<void (WebCore::PolicyAction)>) at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:750
 #9 WebCore::PolicyChecker::checkNavigationPolicy(WebCore::ResourceRequest const&, WebCore::DocumentLoader*, WTF::PassRefPtr<WebCore::FormState>, std::function<void (WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool)>) at /usr/src/debug/webkitgtk-2.10.0/Source/WebCore/loader/PolicyChecker.cpp:122
 #10 WebCore::FrameLoader::loadWithDocumentLoader at /usr/src/debug/webkitgtk-2.10.0/Source/WebCore/loader/FrameLoader.cpp:1485
 #11 WebCore::FrameLoader::load at /usr/src/debug/webkitgtk-2.10.0/Source/WebCore/loader/FrameLoader.cpp:1384
 #13 WebCore::UserInputBridge::loadRequest at /usr/src/debug/webkitgtk-2.10.0/Source/WebCore/replay/UserInputBridge.cpp:242
 #14 WebKit::WebPage::loadRequest at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/WebProcess/WebPage/WebPage.cpp:1056
 #15 IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(unsigned long, WebCore::ResourceRequest const&, WebKit::SandboxExtension::Handle const&, unsigned long, WebKit::UserData const&), std::tuple<unsigned long, WebCore::ResourceRequest, WebKit::SandboxExtension::Handle, unsigned long, WebKit::UserData>, 0ul, 1ul, 2ul, 3ul, 4ul>(WebKit::WebPage*, void (WebKit::WebPage::*)(unsigned long, WebCore::ResourceRequest const&, WebKit::SandboxExtension::Handle const&, unsigned long, WebKit::UserData const&), std::tuple<unsigned long, WebCore::ResourceRequest, WebKit::SandboxExtension::Handle, unsigned long, WebKit::UserData>&&, std::index_sequence<0ul, 1ul, 2ul, 3ul, 4ul>) at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/HandleMessage.h:16
 #16 IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(unsigned long, WebCore::ResourceRequest const&, WebKit::SandboxExtension::Handle const&, unsigned long, WebKit::UserData const&), std::tuple<unsigned long, WebCore::ResourceRequest, WebKit::SandboxExtension::Handle, unsigned long, WebKit::UserData>, std::make_index_sequence<5ul> >(std::tuple<unsigned long, WebCore::ResourceRequest, WebKit::SandboxExtension::Handle, unsigned long, WebKit::UserData>&&, WebKit::WebPage*, void (WebKit::WebPage::*)(unsigned long, WebCore::ResourceRequest const&, WebKit::SandboxExtension::Handle const&, unsigned long, WebKit::UserData const&)) at /usr/src/debug/webkitgtk-2.10.0/Source/WebKit2/Platform/IPC/HandleMessage.h:22