I tested gnome-shell in Ubuntu GNOME 16.04 LTS and 16.10. I was able to reproduce the crash with epiphany-browser (very easily in 16.10). After updating gnome-shell to the version in xenial-proposed and yakkety-proposed, I was unable to reproduce the crash so I'm marking this bug fix as verified.
I tested gnome-shell in Ubuntu GNOME 16.04 LTS and 16.10. I was able to reproduce the crash with epiphany-browser (very easily in 16.10). After updating gnome-shell to the version in xenial-proposed and yakkety-proposed, I was unable to reproduce the crash so I'm marking this bug fix as verified.