Servo can't build because of an ICE that shows up when building rust-glut. The branch fix_strings in https://github.com/mmeyerho/servo is syntax-compatible with the current rust master (6081eb7) up through glut. The backtrace is: https://gist.github.com/3133225. It looks like one of the fields of a tuple is trying to be pretty-printed but can't be looked up successfully.