Bug#866063: GLib-CRITICAL **: g_variant_new_string: assertion 'string != NULL' failed

[Jason Crain]

On Tue, Jun 27, 2017 at 10:33:47AM +0800, 積丹尼 Dan Jacobson wrote:
> Please add the missing package dependencies alluded to in
> https://bugzilla.gnome.org/show_bug.cgi?id=784170 and/or add a
> epiphany-browser-dbg package with the symbols still in.
> 
> Test for missing dependencies by using a minimal system with just
> epiphany-browser and current dependencies installed...

epiphany is using automatic debug packages:
https://wiki.debian.org/AutomaticDebugPackages

For the accessibility messages, I suppose you don't have at-spi2-core
installed.  epiphany should manage to work without it so it's only a
Recommends dependency.  I don't know about the others messages.