Here's the backtrace: Core was generated by `/usr/bin/python ./debian/jstest/run-tests'. Program terminated with signal 11, Segmentation fault. #0 0xf4bc7075 in webkitWebViewRegisterForIconNotification (webView=0x9242000, shouldRegister=false) at ../Source/WebKit/gtk/webkit/webkitwebview.cpp:5108 5108 if (!g_signal_handler_is_connected(database, webView->priv->iconLoadedHandler)) (gdb) bt #0 0xf4bc7075 in webkitWebViewRegisterForIconNotification (webView=0x9242000, shouldRegister=false) at ../Source/WebKit/gtk/webkit/webkitwebview.cpp:5108 #1 0xf4bcc974 in webkitWebViewIconLoaded (database=0x925e060, frameURI=0x92663e0 "http://127.0.0.1:35484/search.html?q=examples", webView=0x9242000) at ../Source/WebKit/gtk/webkit/webkitwebview.cpp:5097 #2 0xf6f6227a in g_cclosure_marshal_VOID__STRING () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #3 0xf6f5f624 in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #4 0xf6f72029 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #5 0xf6f7a87f in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #6 0xf6f7aa83 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #7 0xf4ba1eb8 in webkitFaviconDatabaseDispatchDidReceiveIcon (database=0x925e060, frameURI=0x9266050 "http://127.0.0.1:35484/search.html?q=examples") at ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp:297 #8 0xf4b95788 in dispatchDidReceiveIcon (this=0xf181cd00) at ../Source/WebKit/gtk/WebCoreSupport/FrameLoaderClientGtk.cpp:783 #9 WebKit::FrameLoaderClient::dispatchDidReceiveIcon (this=0xf181cd00) at ../Source/WebKit/gtk/WebCoreSupport/FrameLoaderClientGtk.cpp:772 #10 0xf516230d in WebCore::IconLoader::notifyFinished (this=0xef5e91e0, resource=0xee953b40) at ../Source/WebCore/loader/icon/IconLoader.cpp:98 #11 0xf5119a0b in checkNotify (this=0xee953b40) at ../Source/WebCore/loader/cache/CachedResource.cpp:237 #12 WebCore::CachedResource::checkNotify (this=0xee953b40) at ../Source/WebCore/loader/cache/CachedResource.cpp:230 #13 0xf5119b59 in WebCore::CachedResource::data (this=0xee953b40, allDataReceived=true) at ../Source/WebCore/loader/cache/CachedResource.cpp:246 #14 0xf5117c15 in WebCore::CachedRawResource::data (this=0xee953b40, data=..., allDataReceived=true) at ../Source/WebCore/loader/cache/CachedRawResource.cpp:68 #15 0xf5183c29 in didFinishLoading (finishTime=0, this=0xee72e900) at ../Source/WebCore/loader/SubresourceLoader.cpp:276 #16 WebCore::SubresourceLoader::didFinishLoading (this=0xee72e900, finishTime=0) at ../Source/WebCore/loader/SubresourceLoader.cpp:263 #17 0xf5179555 in WebCore::ResourceLoader::didFinishLoading (this=0xee72e900, finishTime=0) at ../Source/WebCore/loader/ResourceLoader.cpp:451 #18 0xf52b65fa in WebCore::readCallback (source=0x9251af8, asyncResult=0x925ea48, data=0xef5e91f0) at ../Source/WebCore/platform/network/soup/ResourceHandleSoup.cpp:670 #19 0xf66db098 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0 #20 0xf66f0cd0 in g_simple_async_result_complete () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0 #21 0xf4401706 in ?? () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #22 0xf4400c75 in ?? () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #23 0xf6f613e3 in g_cclosure_marshal_VOID__VOIDv () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #24 0xf6f5f8c7 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #25 0xf6f7a451 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #26 0xf6f7aa83 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #27 0xf4404d7d in soup_message_finished () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #28 0xf44185ca in ?? () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #29 0xf441881f in ?? () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #30 0xf4419144 in ?? () from /usr/lib/i386-linux-gnu/libsoup-2.4.so.1 #31 0xf70977e0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0 #32 0xf7099d7a in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0 #33 0xf709a185 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0 #34 0xf709a5cb in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0 #35 0xf69ccb8f in gtk_main () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0 #36 0xf6e7231d in ?? () from /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/_gtk.so #37 0x08089c20 in PyEval_EvalFrameEx () #38 0x081a7d70 in PyEval_EvalCodeEx () #39 0x08088fdc in PyEval_EvalFrameEx () #40 0x081a7d70 in PyEval_EvalCodeEx () #41 0x08088fdc in PyEval_EvalFrameEx () #42 0x081a7d70 in PyEval_EvalCodeEx () #43 0x08151e21 in PyRun_SimpleFileExFlags () #44 0x0815a4d9 in Py_Main () #45 0x0805e78b in main ()