The issue has been reported on https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1211887 The bug and duplicates don't have specific steps to reproduce, that's happening with software-center which is a python-webkit user. The webkit version is 1.10.2 but webkit2 updates seem to have similar issues "#0 0x00007fe1520211f9 in g_logv (log_domain=0x7fe14fd95d46 "Gdk", log_level=G_LOG_LEVEL_ERROR, format=<optimized out>, args=args@entry=0x7fff7b1b15c8) at /build/buildd/glib2.0-2.37.5/./glib/gmessages.c:989 domain = 0x0 data = 0x0 depth = 1 log_func = 0x7fe152020990 <g_log_default_handler> domain_fatal_mask = <optimized out> masquerade_fatal = 0 test_level = <optimized out> was_fatal = <optimized out> was_recursion = <optimized out> msg = 0x4514600 "The program 'software-center' received an X Window System error.\nThis probably reflects a bug in the program.\nThe error was 'BadDrawable (invalid Pixmap or Window parameter)'.\n (Details: serial 3589 "... msg_alloc = 0x4514600 "The program 'software-center' received an X Window System error.\nThis probably reflects a bug in the program.\nThe error was 'BadDrawable (invalid Pixmap or Window parameter)'.\n (Details: serial 3589 "... i = 2 #1 0x00007fe152021342 in g_log (log_domain=log_domain@entry=0x7fe14fd95d46 "Gdk", log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=format@entry=0x7fe14fda1a08 "%s") at /build/buildd/glib2.0-2.37.5/./glib/gmessages.c:1025 args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff7b1b16a0, reg_save_area = 0x7fff7b1b15e0}} #2 0x00007fe14fd74970 in _gdk_x11_display_error_event (display=display@entry=0x24240c0, error=error@entry=0x7fff7b1b1760) at /build/buildd/gtk+3.0-3.8.2/./gdk/x11/gdkdisplay-x11.c:2556 buf = "BadDrawable (invalid Pixmap or Window parameter)", '\000' <repeats 15 times> msg = <optimized out> display_x11 = 0x24240c0 tmp_list = <optimized out> ignore = 0 #3 0x00007fe14fd7f321 in gdk_x_error (xdisplay=0x2416b00, error=0x7fff7b1b1760) at /build/buildd/gtk+3.0-3.8.2/./gdk/x11/gdkmain-x11.c:303 error_display = 0x24240c0 manager = <optimized out> displays = 0x0 error = 0x7fff7b1b1760 xdisplay = 0x2416b00 #4 0x00007fe14f829b9b in _XError (dpy=dpy@entry=0x2416b00, rep=rep@entry=0x43fc520) at ../../src/XlibInt.c:1581 rtn_val = <optimized out> event = {type = 0, xany = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313}, xkey = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, root = 140605681420488, subwindow = 0, time = 45003616, x = 806187680, y = 32737, x_root = 678147232, y_root = 32737, state = 37841664, keycode = 0, same_screen = 1408724085}, xbutton = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, root = 140605681420488, subwindow = 0, time = 45003616, x = 806187680, y = 32737, x_root = 678147232, y_root = 32737, state = 37841664, button = 0, same_screen = 1408724085}, xmotion = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, root = 140605681420488, subwindow = 0, time = 45003616, x = 806187680, y = 32737, x_root = 678147232, y_root = 32737, state = 37841664, is_hint = 0 '\000', same_screen = 1408724085}, xcrossing = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, root = 140605681420488, subwindow = 0, time = 45003616, x = 806187680, y = 32737, x_root = 678147232, y_root = 32737, mode = 37841664, detail = 0, same_screen = 1408724085, focus = 32737, state = 5}, xfocus = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, mode = 1337051336, detail = 32737}, xexpose = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, x = 1337051336, y = 32737, width = 0, height = 0, count = 45003616}, xgraphicsexpose = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, drawable = 33570313, x = 1337051336, y = 32737, width = 0, height = 0, count = 45003616, major_code = 0, minor_code = 806187680}, xnoexpose = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, drawable = 33570313, major_code = 1337051336, minor_code = 32737}, xvisibility = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, state = 1337051336}, xcreatewindow = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, parent = 33570313, window = 140605681420488, x = 0, y = 0, width = 45003616, height = 0, border_width = 806187680, override_redirect = 32737}, xdestroywindow = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488}, xunmap = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, from_configure = 0}, xmap = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, override_redirect = 0}, xmaprequest = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, parent = 33570313, window = 140605681420488}, xreparent = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, parent = 0, x = 45003616, y = 0, override_redirect = 806187680}, xconfigure = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, x = 0, y = 0, width = 45003616, height = 0, border_width = 806187680, above = 140605022516384, override_redirect = 37841664}, xgravity = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, x = 0, y = 0}, xresizerequest = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, width = 1337051336, height = 32737}, xconfigurerequest = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, parent = 33570313, window = 140605681420488, x = 0, y = 0, width = 45003616, height = 0, border_width = 806187680, above = 140605022516384, detail = 37841664, value_mask = 140605753093237}, xcirculate = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, event = 33570313, window = 140605681420488, place = 0}, xcirculaterequest = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, parent = 33570313, window = 140605681420488, place = 0}, xproperty = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, atom = 140605681420488, time = 0, state = 45003616}, xselectionclear = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, selection = 140605681420488, time = 0}, xselectionrequest = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, owner = 33570313, requestor = 140605681420488, selection = 0, target = 45003616, property = 140605150556832, time = 140605022516384}, xselection = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, requestor = 33570313, selection = 140605681420488, target = 0, property = 45003616, time = 140605150556832}, xcolormap = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, colormap = 140605681420488, new = 0, state = 0}, xclient = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, message_type = 140605681420488, format = 0, data = {b = "`\263\256\002\000\000\000\000\240r\r0\341\177\000\000\240\264k(", s = {-19616, 686, 0, 0, 29344, 12301, 32737, 0, -19296, 10347}, l = {45003616, 140605150556832, 140605022516384, 37841664, 140605753093237}}}, xmapping = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, request = 1337051336, first_keycode = 32737, count = 0}, xerror = {type = 0, display = 0x2416b00, resourceid = 62914834, serial = 3589, error_code = 9 '\t', request_code = 62 '>', minor_code = 0 '\000'}, xkeymap = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, window = 33570313, key_vector = "\310\310\261O\341\177\000\000\000\000\000\000\000\000\000\000`\263\256\002\000\000\000\000\240r\r0\341\177\000"}, xgeneric = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, extension = 33570313, evtype = 0}, xcookie = {type = 0, serial = 37841664, send_event = 62914834, display = 0xe05, extension = 33570313, evtype = 0, cookie = 1337051336, data = 0x0}, pad = {0, 37841664, 62914834, 3589, 33570313, 140605681420488, 0, 45003616, 140605150556832, 140605022516384, 37841664, 140605753093237, 5, 0, 32, 140605678078784, 71288096, 37841664, 71288096, 140605753120517, 0, -2, 0, 71288096}} async = <optimized out> next = <optimized out> #5 0x00007fe14f826c07 in handle_error (dpy=0x2416b00, err=0x43fc520, in_XReply=<optimized out>) at ../../src/xcb_io.c:213 ext = <optimized out> ret_code = 0 #6 0x00007fe14f826cb5 in handle_response (dpy=dpy@entry=0x2416b00, response=0x43fc520, in_XReply=in_XReply@entry=0) at ../../src/xcb_io.c:325 async = <optimized out> next = <optimized out> #7 0x00007fe14f82778d in _XReadEvents (dpy=dpy@entry=0x2416b00) at ../../src/xcb_io.c:426 response = <optimized out> serial = 160 #8 0x00007fe14ef5bc31 in _cairo_xlib_shm_surface_flush (abstract_surface=0x42535e0, flags=<optimized out>) at /build/buildd/cairo-1.12.14/src/cairo-xlib-surface-shm.c:696 shm = 0x42535e0 display = 0x451c000 dpy = 0x2416b00 status = CAIRO_STATUS_SUCCESS #9 0x00007fe14ef2aeaf in INT_cairo_surface_flush (surface=0x42535e0) at /build/buildd/cairo-1.12.14/src/cairo-surface.c:1510 status = <optimized out> #10 0x00007fe14ef57cfd in _cairo_xlib_surface_discard_shm (surface=surface@entry=0x59cb8a0) at /build/buildd/cairo-1.12.14/src/cairo-xlib-surface.c:369 No locals. #11 0x00007fe14ef584c7 in _cairo_xlib_surface_finish (abstract_surface=0x59cb8a0) at /build/buildd/cairo-1.12.14/src/cairo-xlib-surface.c:401 surface = 0x59cb8a0 status = CAIRO_STATUS_SUCCESS display = 0x451c000 #12 0x00007fe14ef2a266 in _cairo_surface_finish (surface=0x59cb8a0) at /build/buildd/cairo-1.12.14/src/cairo-surface.c:1007 status = <optimized out> #13 0x00007fe14ef2aba2 in cairo_surface_destroy (surface=0x59cb8a0) at /build/buildd/cairo-1.12.14/src/cairo-surface.c:945 No locals. #14 INT_cairo_surface_destroy (surface=0x59cb8a0) at /build/buildd/cairo-1.12.14/src/cairo-surface.c:924 No locals. #15 0x00007fe14ef100d8 in INT_cairo_pattern_destroy (pattern=0x383a670) at /build/buildd/cairo-1.12.14/src/cairo-pattern.c:1131 type = CAIRO_PATTERN_TYPE_SURFACE __PRETTY_FUNCTION__ = "cairo_pattern_destroy" #16 0x00007fe14eeeda27 in _cairo_gstate_fini (gstate=0x2aeb030) at /build/buildd/cairo-1.12.14/src/cairo-gstate.c:225 No locals. #17 0x00007fe14eeea5fd in _cairo_default_context_fini (cr=cr@entry=0x2aeb000) at /build/buildd/cairo-1.12.14/src/cairo-default-context.c:75 No locals. #18 0x00007fe14eeea679 in _cairo_default_context_destroy (abstract_cr=0x2aeb000) at /build/buildd/cairo-1.12.14/src/cairo-default-context.c:93 cr = 0x2aeb000 #19 0x00007fe12802be14 in ~RefPtr (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../Source/WTF/wtf/RefPtr.h:56 No locals. #20 WebKit::ChromeClient::widgetSizeChanged (this=0x5991d30, oldWidgetSize=..., newSize=...) at ../Source/WebKit/gtk/WebCoreSupport/ChromeClientGtk.cpp:467 cr = {m_ptr = 0x2aeb000} backingStore = <optimized out> #21 0x00007fe1280645f3 in resizeWebViewFromAllocation (webView=webView@entry=0x2aec830, allocation=allocation@entry=0x7fff7b1b2030, sizeChanged=<optimized out>) at ../Source/WebKit/gtk/webkit/webkitwebview.cpp:888 page = 0x5a536f0 oldSize = {m_width = 1, m_height = 200} frameView = 0x7fe130101900 chromeClient = 0x5991d30 #22 0x00007fe128064709 in webkit_web_view_size_allocate (widget=0x2aec830, allocation=0x7fff7b1b2030) at ../Source/WebKit/gtk/webkit/webkitwebview.cpp:905 oldAllocation = {x = 0, y = 0, width = 1, height = 200} sizeChanged = <optimized out> webView = 0x2aec830 #23 0x00007fe1522e5190 in g_cclosure_marshal_VOID__BOXEDv (closure=0x23f3070, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x2385510) at /build/buildd/glib2.0-2.37.5/./gobject/gmarshal.c:1160 cc = 0x23f3070 data1 = <optimized out> data2 = <optimized out> callback = <optimized out> arg0 = 0x7fff7b1b2030 args_copy = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff7b1b1fb0, reg_save_area = 0x7fff7b1b1ef0}} #24 0x00007fe1522e24df in _g_closure_invoke_va (closure=0x23f3070, return_value=0x0, instance=0x2aec830, args=0x7fff7b1b1ed8, n_params=1, param_types=0x2385510) at /build/buildd/glib2.0-2.37.5/./gobject/gclosure.c:840 marshal = 0x7fe1522e0ab0 <g_type_class_meta_marshalv> marshal_data = 0xd8 in_marshal = 1 real_closure = 0x23f3050 __PRETTY_FUNCTION__ = "_g_closure_invoke_va" #25 0x00007fe1522fc38c in g_signal_emit_valist (instance=0x2aec830, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff7b1b1ed8) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3234 return_accu = 0x0 accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} accumulator = 0x0 emission = {next = 0x7fff7b1b2230, instance = 0x2aec830, ihint = {signal_id = 10, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 61251952} signal_id = 10 instance_type = <optimized out> emission_return = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} rtype = 4 static_scope = 0 fastpath_handler = <optimized out> closure = 0x23f3070 run_type = <optimized out> l = <optimized out> fastpath = <optimized out> instance_and_params = <optimized out> signal_return_type = <optimized out> param_values = <optimized out> i = <optimized out> n_params = <optimized out> __PRETTY_FUNCTION__ = "g_signal_emit_valist" __FUNCTION__ = "g_signal_emit_valist" #26 0x00007fe1522fcc62 in g_signal_emit (instance=instance@entry=0x2aec830, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3382 var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff7b1b1fb0, reg_save_area = 0x7fff7b1b1ef0}} #27 0x00007fe1502719aa in gtk_widget_size_allocate (widget=widget@entry=0x2aec830, allocation=allocation@entry=0x7fff7b1b20b0) at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkwidget.c:5341 priv = 0x2aec790 real_allocation = {x = 0, y = 0, width = 835, height = 250} old_allocation = {x = 0, y = 0, width = 1, height = 200} adjusted_allocation = {x = 0, y = 0, width = 835, height = 250} alloc_needed = 1 size_changed = 1 position_changed = 0 natural_width = 835 natural_height = 250 dummy = 0 min_width = 835 min_height = 250 __PRETTY_FUNCTION__ = "gtk_widget_size_allocate" #28 0x00007fe150180e68 in gtk_offscreen_window_size_allocate (widget=0x305edc0, allocation=0x7fff7b1b2590) at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkoffscreenwindow.c:150 child_alloc = {x = 0, y = 0, width = 835, height = 250} bin = 0x305edc0 child = 0x2aec830 border_width = <optimized out> #29 0x00007fe1522e2338 in g_closure_invoke (closure=0x23f3070, return_value=0x0, n_param_values=2, param_values=0x7fff7b1b22a0, invocation_hint=0x7fff7b1b2240) at /build/buildd/glib2.0-2.37.5/./gobject/gclosure.c:777 marshal = 0x7fe1522e0c30 <g_type_class_meta_marshal> marshal_data = 0xd8 in_marshal = 0 real_closure = 0x23f3050 __PRETTY_FUNCTION__ = "g_closure_invoke" #30 0x00007fe1522f3f8f in signal_emit_unlocked_R (node=node@entry=0x2385530, detail=detail@entry=0, instance=instance@entry=0x305edc0, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff7b1b22a0) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3512 accumulator = 0x0 emission = {next = 0x7fff7b1b2740, instance = 0x305edc0, ihint = {signal_id = 10, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 46838800} handler_list = <optimized out> return_accu = 0x0 accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} signal_id = 10 max_sequential_handler_number = 3634 return_value_altered = <optimized out> #31 0x00007fe1522fc98a in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff7b1b2438) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3326 instance_and_params = 0x7fff7b1b22a0 signal_return_type = <optimized out> param_values = 0x7fff7b1b22b8 i = <optimized out> n_params = <optimized out> __PRETTY_FUNCTION__ = "g_signal_emit_valist" __FUNCTION__ = "g_signal_emit_valist" #32 0x00007fe1522fcc62 in g_signal_emit (instance=instance@entry=0x305edc0, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3382 var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff7b1b2510, reg_save_area = 0x7fff7b1b2450}} #33 0x00007fe1502719aa in gtk_widget_size_allocate (widget=widget@entry=0x305edc0, allocation=allocation@entry=0x7fff7b1b2610) at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkwidget.c:5341 priv = 0x305ed20 real_allocation = {x = 0, y = 0, width = 835, height = 250} old_allocation = {x = 0, y = 0, width = 1, height = 200} adjusted_allocation = {x = 0, y = 0, width = 835, height = 250} alloc_needed = 1 size_changed = 1 position_changed = 0 natural_width = 835 natural_height = 250 dummy = 0 min_width = 835 min_height = 250 __PRETTY_FUNCTION__ = "gtk_widget_size_allocate" #34 0x00007fe150180da0 in gtk_offscreen_window_resize (widget=0x305edc0) at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkoffscreenwindow.c:206 allocation = {x = 0, y = 0, width = 835, height = 250} requisition = {width = 835, height = 250} #35 0x00007fe1522e2567 in _g_closure_invoke_va (closure=0x23f71b0, return_value=0x0, instance=0x305edc0, args=0x7fff7b1b2808, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.37.5/./gobject/gclosure.c:840 marshal = 0x7fe1522e0ab0 <g_type_class_meta_marshalv> marshal_data = 0x348 in_marshal = 0 real_closure = 0x23f7190 __PRETTY_FUNCTION__ = "_g_closure_invoke_va" #36 0x00007fe1522fc38c in g_signal_emit_valist (instance=0x305edc0, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff7b1b2808) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3234 return_accu = 0x0 accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} accumulator = 0x0 emission = {next = 0x7fff7b1b2a10, instance = 0x305edc0, ihint = {signal_id = 74, detail = 0, run_type = G_SIGNAL_RUN_LAST}, state = EMISSION_RUN, chain_type = 46838800} signal_id = 74 instance_type = <optimized out> emission_return = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} rtype = 4 static_scope = 0 fastpath_handler = <optimized out> closure = 0x23f71b0 run_type = <optimized out> l = <optimized out> fastpath = <optimized out> instance_and_params = <optimized out> signal_return_type = <optimized out> param_values = <optimized out> i = <optimized out> n_params = <optimized out> __PRETTY_FUNCTION__ = "g_signal_emit_valist" __FUNCTION__ = "g_signal_emit_valist" #37 0x00007fe1522fcc62 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3382 var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff7b1b28e0, reg_save_area = 0x7fff7b1b2820}} #38 0x00007fe1500bb96c in gtk_container_idle_sizer (clock=0x2ee89d0, container=0x305edc0) at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkcontainer.c:1671 No locals. #39 0x00007fe1522e2567 in _g_closure_invoke_va (closure=0x41a3260, return_value=0x0, instance=0x2ee89d0, args=0x7fff7b1b2b30, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.37.5/./gobject/gclosure.c:840 marshal = 0x7fe1522e40c0 <g_cclosure_marshal_VOID__VOIDv> marshal_data = 0x0 in_marshal = 0 real_closure = 0x41a3240 __PRETTY_FUNCTION__ = "_g_closure_invoke_va" #40 0x00007fe1522fc38c in g_signal_emit_valist (instance=instance@entry=0x2ee89d0, signal_id=signal_id@entry=139, detail=detail@entry=0, var_args=var_args@entry=0x7fff7b1b2b30) at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3234 return_accu = 0x0 accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} accumulator = 0x0 emission = {next = 0x0, instance = 0x2ee89d0, ihint = {signal_id = 139, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 37986160} signal_id = 139 instance_type = <optimized out> emission_return = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} rtype = 4 static_scope = 0 fastpath_handler = <optimized out> closure = 0x41a3260 run_type = <optimized out> l = <optimized out> fastpath = <optimized out> instance_and_params = <optimized out> signal_return_type = <optimized out> param_values = <optimized out> i = <optimized out> n_params = <optimized out> __PRETTY_FUNCTION__ = "g_signal_emit_valist" __FUNCTION__ = "g_signal_emit_valist" #41 0x00007fe1522fd192 in g_signal_emit_by_name (instance=instance@entry=0x2ee89d0, detailed_signal=detailed_signal@entry=0x7fe14fd9a4ed "layout") at /build/buildd/glib2.0-2.37.5/./gobject/gsignal.c:3422 var_args = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x7fff7b1b2c70, reg_save_area = 0x7fff7b1b2b80}} detail = 0 signal_id = 139 itype = 37986160 __PRETTY_FUNCTION__ = "g_signal_emit_by_name" #42 0x00007fe14fd58a27 in gdk_frame_clock_paint_idle (data=0x2ee89d0) at /build/buildd/gtk+3.0-3.8.2/./gdk/gdkframeclockidle.c:400 clock = 0x2ee89d0 clock_idle = 0x2ee89d0 priv = 0x2ee88f0 skip_to_resume_events = <optimized out> timings = 0x5afe6a0 #43 0x00007fe14fd4bc48 in gdk_threads_dispatch (data=0x253ada0, data@entry=<error reading variable: value has been optimized out>) at /build/buildd/gtk+3.0-3.8.2/./gdk/gdk.c:788 dispatch = 0x253ada0 ret = 0 #44 0x00007fe15201acc3 in g_timeout_dispatch (source=source@entry=0x413e290, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/glib2.0-2.37.5/./glib/gmain.c:4450 timeout_source = 0x413e290 again = <optimized out> #45 0x00007fe15201a166 in g_main_dispatch (context=0x2412560) at /build/buildd/glib2.0-2.37.5/./glib/gmain.c:3065 dispatch = 0x7fe15201acb0 <g_timeout_dispatch> was_in_call = 0 user_data = 0x253ada0 callback = 0x7fe14fd4bc20 <gdk_threads_dispatch> cb_funcs = 0x7fe1522d0940 <g_source_callback_funcs> cb_data = 0x3c15d70 need_destroy = <optimized out> current_source_link = {data = 0x413e290, next = 0x0} source = 0x413e290 current = 0x2407c10 i = 0 #46 g_main_context_dispatch (context=context@entry=0x2412560) at /build/buildd/glib2.0-2.37.5/./glib/gmain.c:3641 No locals. #47 0x00007fe15201a4b8 in g_main_context_iterate (context=0x2412560, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.37.5/./glib/gmain.c:3712 max_priority = 120 timeout = 0 some_ready = 1 nfds = <optimized out> allocated_nfds = 7 fds = 0x3cd9b60 #48 0x00007fe15201a8ba in g_main_loop_run (loop=0x3627360) at /build/buildd/glib2.0-2.37.5/./glib/gmain.c:3906 __PRETTY_FUNCTION__ = "g_main_loop_run" #49 0x00007fe15014e365 in gtk_main () at /build/buildd/gtk+3.0-3.8.2/./gtk/gtkmain.c:1156 loop = 0x3627360 #50 0x00007fe151659c18 in ffi_call_unix64 () at ../src/x86/unix64.S:76 No locals. #51 0x00007fe151659580 in ffi_call (cif=cif@entry=0x7fff7b1b2fd0, fn=fn@entry=0x7fe15014e2e0 <gtk_main>, rvalue=rvalue@entry=0x7fff7b1b2fb0, avalue=avalue@entry=0x7fff7b1b2f10) at ../src/x86/ffi64.c:522 classes = {96095472, X86_64_NO_CLASS, 2065379280, 32767} stack = 0x7fff7b1b2d60 "" argp = 0x7fff7b1b2e10 "" arg_types = 0x7fff7b1b2f20 gprcount = 0 ssecount = <optimized out> ngpr = 0 nsse = 0 i = <optimized out> avn = <optimized out> ret_in_memory = <optimized out> reg_args = 0x7fff7b1b2d60 #52 0x00007fe15252ed19 in g_callable_info_invoke (info=info@entry=0x5ba4cf0, function=0x7fe15014e2e0 <gtk_main>, in_args=in_args@entry=0x0, n_in_args=n_in_args@entry=0, out_args=out_args@entry=0x0, n_out_args=n_out_args@entry=0, return_value=return_value@entry=0x7fff7b1b31a8, is_method=is_method@entry=0, throws=0, error=error@entry=0x7fff7b1b3158) at girepository/gicallableinfo.c:680 cif = {abi = FFI_UNIX64, nargs = 0, arg_types = 0x7fff7b1b2f20, rtype = 0x7fe15165a000 <ffi_type_void>, bytes = 0, flags = 0} rtype = 0x7fe15165a000 <ffi_type_void> atypes = 0x7fff7b1b2f20 tinfo = <optimized out> rinfo = 0x5a1e400 rtag = GI_TYPE_TAG_VOID ainfo = <optimized out> n_args = 0 n_invoke_args = 0 in_pos = 0 out_pos = <optimized out> i = <optimized out> args = 0x7fff7b1b2f10 success = 0 local_error = 0x0 error_address = 0x7fff7b1b2fc0 ffi_return_value = {v_boolean = 93772276, v_int8 = -12 '\364', v_uint8 = 244 '\364', v_int16 = -9740, v_uint16 = 55796, v_int32 = 93772276, v_uint32 = 93772276, v_int64 = 93772276, v_uint64 = 93772276, v_float = 1.41859955e-35, v_double = 4.6329660103943623e-316, v_short = -9740, v_ushort = 55796, v_int = 93772276, v_uint = 93772276, v_long = 93772276, v_ulong = 93772276, v_ssize = 93772276, v_size = 93772276, v_string = 0x596d9f4 "3", v_pointer = 0x596d9f4} return_value_p = 0x7fff7b1b2fb0 __PRETTY_FUNCTION__ = "g_callable_info_invoke" #53 0x00007fe152530057 in g_function_info_invoke (info=info@entry=0x5ba4cf0, in_args=0x0, n_in_args=0, out_args=0x0, n_out_args=0, return_value=return_value@entry=0x7fff7b1b31a8, error=error@entry=0x7fff7b1b3158) at girepository/gifunctioninfo.c:274 symbol = <optimized out> func = 0x7fe15014e2e0 <gtk_main> is_method = 0 throws = <optimized out> #54 0x00007fe15276c027 in _invoke_callable (function_ptr=0x0, callable_info=0x5ba4cf0, cache=0x632c1e0, state=0x7fff7b1b3160) at ../../gi/pygi-invoke.c:64 _save = 0x21320a0 error = 0x0 retval = <optimized out> #55 pygi_callable_info_invoke (info=<optimized out>, py_args=<optimized out>, kwargs=<optimized out>, cache=<optimized out>, function_ptr=<optimized out>, user_data=<optimized out>) at ../../gi/pygi-invoke.c:652 state = {py_in_args = 0x7fe15412d050, n_py_in_args = 0, current_arg = 0, implementor_gtype = 0, args = 0x0, in_args = 0x0, args_data = 0x0, out_args = 0x0, out_values = 0x0, return_arg = {v_boolean = 0, v_int8 = 0 '\000', v_uint8 = 0 '\000', v_int16 = 0, v_uint16 = 0, v_int32 = 0, v_uint32 = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_short = 0, v_ushort = 0, v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_ssize = 0, v_size = 0, v_string = 0x0, v_pointer = 0x0}, error = 0x0, failed = 0, user_data = 0x0} ret = 0x0 #56 0x00000000004fe720 in PyObject_Call (kw=0x0, arg=0x7fe15412d050, func=0x5972420) at ../Objects/abstract.c:2529 result = <optimized out> call = 0x7fe152762400 <_function_info_call> #57 do_call (nk=<optimized out>, na=<optimized out>, pp_stack=0x7fff7b1b3300, func=0x5972420) at ../Python/ceval.c:4239 callargs = <optimized out> kwdict = 0x0 result = 0x0 #58 call_function (oparg=<optimized out>, pp_stack=0x7fff7b1b3300) at ../Python/ceval.c:4044 func = 0x5972420 w = <optimized out> na = <optimized out> nk = <optimized out> n = <optimized out> pfunc = 0x2219748 x = <optimized out> #59 PyEval_EvalFrameEx (f=f@entry=0x22195d0, throwflag=throwflag@entry=0) at ../Python/ceval.c:2666 sp = 0x2219750 stack_pointer = <optimized out> next_instr = 0x221cb76 "\001n" opcode = <optimized out> oparg = <optimized out> why = WHY_NOT err = <optimized out> x = <optimized out> v = <optimized out> w = <optimized out> u = <optimized out> t = <optimized out> stream = 0x0 fastlocals = 0x2219748 freevars = <optimized out> retval = <optimized out> tstate = <optimized out> co = <optimized out> instr_ub = -1 instr_lb = 0 instr_prev = -1 first_instr = <optimized out> names = <optimized out> consts = <optimized out> enter = 0x7fe154143de0 exit = 0x7fe154143e10 #60 0x000000000056c414 in PyEval_EvalCodeEx (co=0x7fe1540b3b30, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3253 f = <optimized out> retval = 0x0 fastlocals = <optimized out> freevars = <optimized out> tstate = <optimized out> x = <optimized out> u = <optimized out> #61 0x00000000005ba3b2 in PyEval_EvalCode (co=<optimized out>, globals=<optimized out>, locals=<optimized out>) at ../Python/ceval.c:667 No locals. #62 0x00000000005abe1b in run_mod.42564 (mod=<optimized out>, filename=<optimized out>, globals=0x216f690, locals=0x216f690, flags=<optimized out>, arena=<optimized out>) at ../Python/pythonrun.c:1365 co = 0x7fe1540b3b30 v = <optimized out> #63 0x000000000045270b in PyRun_FileExFlags (fp=fp@entry=0x21ff230, filename=filename@entry=0x7fff7b1b48ca "/usr/bin/software-center", start=start@entry=257, globals=globals@entry=0x216f690, locals=locals@entry=0x216f690, closeit=closeit@entry=1, flags=flags@entry=0x7fff7b1b3540) at ../Python/pythonrun.c:1351 ret = <optimized out> mod = 0x2215188 arena = 0x21aa740 #64 0x0000000000452f05 in PyRun_SimpleFileExFlags (fp=fp@entry=0x21ff230, filename=<optimized out>, filename@entry=0x7fff7b1b48ca "/usr/bin/software-center", closeit=closeit@entry=1, flags=flags@entry=0x7fff7b1b3540) at ../Python/pythonrun.c:943 m = 0x7fe154161cc8 d = 0x216f690 v = <optimized out> ext = 0x7fff7b1b48de "nter" set_file_name = 1 len = <optimized out> ret = -1 #65 0x0000000000453001 in PyRun_AnyFileExFlags (fp=fp@entry=0x21ff230, filename=filename@entry=0x7fff7b1b48ca "/usr/bin/software-center", closeit=closeit@entry=1, flags=flags@entry=0x7fff7b1b3540) at ../Python/pythonrun.c:747 No locals. #66 0x0000000000453b6a in Py_Main (argc=<optimized out>, argv=0x7fff7b1b36f8) at ../Modules/main.c:640 c = <optimized out> sts = <optimized out> command = 0x0 filename = 0x7fff7b1b48ca "/usr/bin/software-center" module = 0x0 fp = 0x21ff230 p = <optimized out> unbuffered = <optimized out> skipfirstline = <optimized out> stdin_is_interactive = 0 help = <optimized out> version = <optimized out> saw_unbuffered_flag = <optimized out> cf = {cf_flags = 0} #67 0x00007fe153081de5 in __libc_start_main (main=0x453c28 <main>, argc=2, ubp_av=0x7fff7b1b36f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7b1b36e8) at libc-start.c:260 result = <optimized out> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 2326239894385323567, 5744344, 140735258769136, 0, 0, -2326530399755440593, -2338827482476057041}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x5bb4e0 <__libc_csu_init>, 0x7fff7b1b36f8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 6010080}}} not_first_call = <optimized out> #68 0x000000000057a701 in _start () No symbol table info available."
Created attachment 218591 [details] stacktrace of the issue, using GDK_SYNCHRONIZE=1 That's a stracktrace collected using GDK_SYNCHRONIZE=1 and b gdk_x_error
(the new stacktace is from webkit 2.3.2 ... those issues started in Ubuntu in 13.10, or we didn't change cairo or webkit that cycle, could it be a GTK issue? (we updated from 3.6 to 3.8 in the cycle where reports started))
I've open a cairo bug in case, https://bugs.freedesktop.org/show_bug.cgi?id=72393
Created attachment 218656 [details] Patch
I could not reproduce this with WebKit master and cairo 1.12.16, it looks from the trace like resizing the window should be enough to trigger it, but that is not enough in GtkLauncher/MiniBrowser. Nevertheless, this should fix it.
Committed r160269: <http://trac.webkit.org/changeset/160269>
Created attachment 218742 [details] new stacktrace of the issue That's still an issue, could somebody reopen? :/ That's the change tested https://launchpadlibrarian.net/158610191/webkitgtk_2.3.2-1ubuntu2_2.3.2-1ubuntu3~build1.diff.gz software-center still hits the Xerror on start, new bt joined, it looks the same
(In reply to comment #7) > That's still an issue, could somebody reopen? :/ Hey, is this still crashing with webkit 2.4.x? Please confirm and I'll reopen the bug.
(In reply to comment #8) > Hey, is this still crashing with webkit 2.4.x? Please confirm and I'll > reopen the bug. I wasn't able to reproduce this bug with WebKit 2.4.11 so I dropped the patch from Ubuntu 16.10 "yakkety" today. We'll let you know if it ends up that the patch was needed after all.