rust build error: unexpected token

rust-build.log

connolly@pav:~/src/rust$ git pull origin
remote: Counting objects: 5323, done.
remote: Compressing objects: 100% (1656/1656), done.
remote: Total 4469 (delta 3494), reused 3682 (delta 2804)
Receiving objects: 100% (4469/4469), 1.26 MiB | 783 KiB/s, done.
Resolving deltas: 100% (3494/3494), completed with 396 local objects.
From https://github.com/mozilla/rust
   4dc67c5..de0268b  incoming   -> origin/incoming
   07edf90..68c73dc  master     -> origin/master
   cd6f24f..be6613e  snap-stage3 -> origin/snap-stage3
 + d324a42...aee0b76 try        -> origin/try  (forced update)
 + d0c6ce3...a28cdc8 try2       -> origin/try2  (forced update)
Fetching submodule src/llvm
remote: Counting objects: 9, done.
remote: Compressing objects: 100% (1/1), done.
remote: Total 5 (delta 4), reused 5 (delta 4)
Unpacking objects: 100% (5/5), done.
From git://github.com/brson/llvm
   dc4cdbf..accc36b  master     -> origin/master
You asked to pull from the remote 'origin', but did not specify
a branch. Because this is not the default configured remote
for your current branch, you must specify a branch on the command line.
connolly@pav:~/src/rust$ git pull origin/master
fatal: 'origin/master' does not appear to be a git repository
fatal: The remote end hung up unexpectedly
connolly@pav:~/src/rust$ ^C
connolly@pav:~/src/rust$ make
cfg: shell host triple x86_64-unknown-linux-gnu
cfg: host for x86_64-unknown-linux-gnu is x86_64
cfg: unix-y environment
cfg: using gcc
cfg: no pandoc found, omitting doc/rust.pdf
cfg: no llnextgen found, omitting grammar-verification
cfg: no pandoc found, omitting library doc build
compile_and_link: x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/libcore.so
/home/connolly/src/rust/src/libcore/path.rs:66:8: 66:9 error: unexpected token: `+`
/home/connolly/src/rust/src/libcore/path.rs:66         + str::connect(self.components, "/")
                                                       ^
make: *** [x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/libcore.so] Error 101