loop.rs

           // the main loop
            let keep_going = true;
            let uv_has_begun = false;
            while (keep_going) {
                let new_msg = comm::recv(rust_loop_port);
                alt new_msg {
                  msg_run() {
                    // call uv_run()
                    if (uv_has_begun) {
                        fail "uv_run() already called";
                    }
                    // because of how enclosing the scheduler is
                    // set up, libuv should be able to claim a
                    // whole OS thread to itself...
                    task::spawn {||
                        // this will block
                        rustrt::rust_uvtmp_uv_run(uv_loop_t);
                        // and when it ends..
                        keep_going = false;
                    };
                  }
                  msg_loop_delete() {
                    // call into libuv, then..
                    keep_going = false;
                  }
                  msg_timer_init() {
                    // get uv_timer_t
                  }
                  msg_timer_start(delay, repeat, cb) {
                    // kick off the timer in uv..
                  }
                  _ {
                    fail "unknown form of uv::uv_msg received";
                  }
                }
            }
        };

output.txt

src/libstd/uvtmp.rs:80                 map::new_bytes_hash();
src/libstd/uvtmp.rs:100:24: 100:34 error: assigning to upvar
src/libstd/uvtmp.rs:100                         keep_going = false;
                                                ^~~~~~~~~~