"debuginfo: Could not find namespace node" building rust-http

[kmcallister]

$ make
make[1]: Entering directory `/home/keegan/proj/servo/servo/build/x86_64-unknown-linux-gnu/src/support/http/rust-http'
/home/keegan/proj/servo/servo/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/bin/rustc -O /home/keegan/proj/servo/servo/src/s
upport/http/rust-http/src/libhttp/codegen/codegen.rs -o codegen
./codegen status.rs /home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/generated/
./codegen read_method.rs /home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/generated/
/home/keegan/proj/servo/servo/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/bin/rustc -Z debug-info -Z no-debug-borrows -O  
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/lib.rs --out-dir .
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:77:8: 101:9 warning: debuginfo: Could not find namespace node for function
                                          with name url_to_socket_addr. This is a bug! Please report this to
                                          github.com/mozilla/rust/issues
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:77         fn url_to_socket_addr(url: &Url) -> SocketAddr {
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:78             // Just grab the first IPv4 address
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:79             let addrs = get_host_addresses(url.host);
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:80             // TODO: Error handling
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:81             let addrs = addrs.unwrap();
/home/keegan/proj/servo/servo/src/support/http/rust-http/src/libhttp/client/request.rs:82             let addr = do addrs.move_iter().find |&a| {
                                                                                          ...

[jdm]

#9268.