It happens when the FrameState has children, because the recursive serialization is wrong. (epiphany:19881): GLib-CRITICAL **: g_variant_builder_open: assertion '!GVSB(builder)->expected_type || g_variant_type_is_subtype_of (type, GVSB(builder)->expected_type)' failed (epiphany:19881): GLib-CRITICAL **: g_variant_builder_add_value: assertion '!GVSB(builder)->expected_type || g_variant_is_of_type (value, GVSB(builder)->expected_type)' failed (epiphany:19881): GLib-CRITICAL **: g_variant_builder_add_value: assertion '!GVSB(builder)->expected_type || g_variant_is_of_type (value, GVSB(builder)->expected_type)' failed (epiphany:19881): GLib-CRITICAL **: g_variant_builder_add_value: assertion '!GVSB(builder)->expected_type || g_variant_is_of_type (value, GVSB(builder)->expected_type)' failed (epiphany:19881): GLib-CRITICAL **: g_variant_builder_add_value: assertion '!GVSB(builder)->expected_type || g_variant_is_of_type (value, GVSB(builder)->expected_type)' failed (epiphany:19881): GLib-CRITICAL **: g_variant_builder_open: assertion '!GVSB(builder)->expected_type || g_variant_type_is_subtype_of (type, GVSB(builder)->expected_type)' failed
Created attachment 269055 [details] Patch
Thanks for the patch. If this patch contains new public API please make sure it follows the guidelines for new WebKit2 GTK+ API. See http://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Created attachment 269060 [details] Updated patch The decode part also needed to be fixed.
Committed r195166: <http://trac.webkit.org/changeset/195166>