Ouch. Did you run the build with multiple jobs? (Parallel builds have been a bit messed up because of fetching the bootstrap, but you can coax it into working.)
I don't think I've actually tried that, except on my netbook (conclusion: don't try to build Rust on a netbook.) I have made a habit of typing supplying `-j 8` to make. Note: if it hasn't been fixed yet, you'll need to fetch the bootstrap compiler before that will work.
