Merge remote-tracking branch 'brson/io' into io-upstream

Conflicts:
	src/rt/rust_builtin.cpp
	src/rt/rustrt.def.in

src/libstd/task/spawn.rs

@@ -92,6 +92,7 @@ use util;
 use unstable::sync::{Exclusive, exclusive};
 use rt::local::Local;
 use iterator::{IteratorUtil};
+use rt::task::Task;
 
 #[cfg(test)] use task::default_task_opts;
 #[cfg(test)] use comm;
@@ -580,9 +581,14 @@ pub fn spawn_raw(opts: TaskOpts, f: ~fn()) {
 fn spawn_raw_newsched(_opts: TaskOpts, f: ~fn()) {
     use rt::sched::*;
 
+    let task = do Local::borrow::<Task, ~Task>() |running_task| {
+        ~running_task.new_child()
+    };
+
     let mut sched = Local::take::<Scheduler>();
-    let task = ~Coroutine::new(&mut sched.stack_pool, f);
-    sched.schedule_new_task(task);
+    let task = ~Coroutine::with_task(&mut sched.stack_pool,
+                                     task, f);
+    sched.schedule_task(task);
 }
 
 fn spawn_raw_oldsched(mut opts: TaskOpts, f: ~fn()) {