[Webkit-unassigned] [Bug 199573] [GTK] Next crashes when using D-Bus and hardware acceleration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=199573

--- Comment #4 from mail at ambrevar.xyz ---
More valgrind investigation didn't reveal much:

```
==15710== Invalid read of size 8
==15710==    at 0x76608B0: _gtk_settings_get_screen (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x751B703: gtk_css_value_icon_theme_compute (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x7539A73: gtk_css_static_style_compute_value (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x752648B: _gtk_css_lookup_resolve (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x75399AF: gtk_css_static_style_new_compute (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x75399F4: gtk_css_static_style_get_default (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x7526DC1: gtk_css_node_init (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==    by 0x933A536: g_type_create_instance (in /gnu/store/0q9pq9flr76rh4bv2524niknknnl2kvq-glib-2.56.3/lib/libgobject-2.0.so.0.5600.3)
==15710==    by 0x931CB1A: g_object_new_internal (in /gnu/store/0q9pq9flr76rh4bv2524niknknnl2kvq-glib-2.56.3/lib/libgobject-2.0.so.0.5600.3)
==15710==    by 0x931DFB1: g_object_new_with_properties (in /gnu/store/0q9pq9flr76rh4bv2524niknknnl2kvq-glib-2.56.3/lib/libgobject-2.0.so.0.5600.3)
==15710==    by 0x931EBA0: g_object_new (in /gnu/store/0q9pq9flr76rh4bv2524niknknnl2kvq-glib-2.56.3/lib/libgobject-2.0.so.0.5600.3)
==15710==    by 0x7541AA9: gtk_css_widget_node_new (in /gnu/store/h6dmb84rn291nwny73x3wfa1anh8n32g-gtk+-3.24.8/lib/libgtk-3.so.0.2404.4)
==15710==  Address 0x18 is not stack'd, malloc'd or (recently) free'd
```

After a double check with my previous working commit, I figure that I had accidentally removed

```
        gtk_init(NULL, NULL);
```

GTK was never initialized!
With that back in place, everything works.

That said, I'm very curious why everything works perfectly _with_ hardware acceleration enabled, but not without.  Does hardware acceleration somehow call gtk_init()?

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