This is a hack to solve some crashes for GTK4 apps in the pinephone
by dirty fixing an upstream bug[1]. The real fix will take longer and
will not be trivial to backport[2]. In the meanwhile, we force a GLES
context if it is allowed and the shared context is also using GLES,
to avoid the creation of a GL context with wrong version. Hopefully,
this should not have additional side-effects for other devices.

[1] https://gitlab.gnome.org/GNOME/gtk/-/issues/4763
[2] https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/4687

diff --git i/gdk/gdkglcontext.c w/gdk/gdkglcontext.c
index 3869b14da0..57a3661492 100644
--- i/gdk/gdkglcontext.c
+++ w/gdk/gdkglcontext.c
@@ -280,6 +280,11 @@ gdk_gl_context_real_realize (GdkGLContext  *context,
       G_GNUC_UNUSED gint64 start_time = GDK_PROFILER_CURRENT_TIME;

       if (share != NULL)
-        gdk_gl_context_get_required_version (share, &major, &minor);
+        {
+          gdk_gl_context_get_required_version (share, &major, &minor);
+          if (gdk_gl_context_get_use_es (share) &&
+              gdk_gl_context_is_api_allowed (context, GDK_GL_API_GLES, NULL))
+            gdk_gl_context_set_allowed_apis (context, GDK_GL_API_GLES);
+        }
       else
         gdk_gl_context_get_required_version (context, &major, &minor);