I'm trying to build a small application using Qt 5.9.3 + QtWebKit 5.212 on Ubuntu 18.04 (everything is fine on Windows 7/10). When loading pages containing Flash, I get a crash.
In the console displays:
(untitled1: 19097): GLib-GObject-WARNING **: 07: 06: 16.360: cannot register existing type 'GdkDisplayManager'
(untitled1: 19097): GLib-CRITICAL **: 07: 06: 16.360: g_once_init_leave: assertion 'result! = 0' failed
(untitled1: 19097): GLib-GObject-CRITICAL **: 07: 06: 16.360: g_object_new_with_properties: assertion 'G_TYPE_IS_OBJECT (object_type)' failed
(untitled1: 19097): GLib-GObject-WARNING **: 07: 06: 16.360: invalid (NULL) pointer instance
(untitled1: 19097): GLib-GObject-CRITICAL **: 07: 06: 16.360: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(untitled1: 19097): GLib-GObject-WARNING **: 07: 06: 16.360: invalid (NULL) pointer instance
(untitled1: 19097): GLib-GObject-CRITICAL **: 07: 06: 16.360: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(untitled1: 19097): GLib-GObject-WARNING **: 07: 06: 16.361: cannot register existing type 'GdkDisplay'
(untitled1: 19097): GLib-CRITICAL **: 07: 06: 16.361: g_once_init_leave: assertion 'result! = 0' failed
(untitled1: 19097): GLib-GObject-CRITICAL **: 07: 06: 16.361: g_type_register_static: assertion 'parent_type> 0' failed
(untitled1: 19097): GLib-CRITICAL **: 07: 06: 16.361: g_once_init_leave: assertion 'result! = 0' failed
(untitled1: 19097): GLib-GObject-CRITICAL **: 07: 06: 16.361: g_object_new_with_properties: assertion 'G_TYPE_IS_OBJECT (object_type)' failed
Stack:
1 gdk_display_open
0x7f85a81ea85c 2 gdk_display_open_default_libgtk_only
0x7f85a81b9eb2 3 gtk_init
0x7f855a80c8d2 4 WebCore :: initializeGtk
PluginPackageQt.cpp 130 0x7f85c7dce75f 5 WebCore :: PluginPackage :: load
PluginPackageQt.cpp 217 0x7f85c7dcec8f 6 WebCore :: PluginView :: init PluginView.cpp 210 0x7f85c7db7413 7 WebCore :: PluginView :: setParent
PluginViewQt.cpp 492 0x7f85c7dd20f8 8 WebCore :: ScrollView :: addChild
Please tell me what is the problem?
I've been sitting for a week, I can't figure it out
PS .: QWebEngine could not be used due to poor flash performance in Windows.
