Unfortunately those crash files don't appear to be related to this bug. That's not completely surprising if the "freeze" isn't caused by a crash.
Next, please get a second computer and ssh into the freezing one (you may need to install 'openssh-server' on the freezing one first). Then reproduce the freeze and while it is frozen, from ssh run:
killall -ABRT gnome-shell
Wait a minute or two and that should produce a new crash file. Then follow the instructions in comment #2 again.
Thanks.
Unfortunately those crash files don't appear to be related to this bug. That's not completely surprising if the "freeze" isn't caused by a crash.
Next, please get a second computer and ssh into the freezing one (you may need to install 'openssh-server' on the freezing one first). Then reproduce the freeze and while it is frozen, from ssh run:
killall -ABRT gnome-shell
Wait a minute or two and that should produce a new crash file. Then follow the instructions in comment #2 again.