I opened the control center, chose "Accounts", clicked on the generic
icon to choose an image, and then clicked "choose a photo".

the webcam light turned on, a dialog box with the camera feed came up,
and i clicked the photo button.

The screen flashed white, and then the entire control center disappeared.

I tried it again launching gnome-control-center from the console and
saw it was a segfault.

below is a backtrace from gdb.