librustrt: fix fallout

src/librustrt/lib.rs

@@ -19,6 +19,7 @@
 #![feature(macro_rules, phase, globs, thread_local, asm)]
 #![feature(linkage, lang_items, unsafe_destructor, default_type_params)]
 #![feature(import_shadowing, slicing_syntax)]
+#![feature(unboxed_closures)]
 #![no_std]
 #![experimental]
 

src/librustrt/task.rs

@@ -22,6 +22,7 @@ use core::atomic::{AtomicUint, SeqCst};
 use core::iter::{IteratorExt, Take};
 use core::kinds::marker;
 use core::mem;
+use core::ops::FnMut;
 use core::prelude::{Clone, Drop, Err, Iterator, None, Ok, Option, Send, Some};
 use core::prelude::{drop};
 
@@ -297,9 +298,9 @@ impl Task {
     // `awoken` field which indicates whether we were actually woken up via some
     // invocation of `reawaken`. This flag is only ever accessed inside the
     // lock, so there's no need to make it atomic.
-    pub fn deschedule(mut self: Box<Task>,
-                      times: uint,
-                      f: |BlockedTask| -> ::core::result::Result<(), BlockedTask>) {
+    pub fn deschedule<F>(mut self: Box<Task>, times: uint, mut f: F) where
+        F: FnMut(BlockedTask) -> ::core::result::Result<(), BlockedTask>,
+    {
         unsafe {
             let me = &mut *self as *mut Task;
             let task = BlockedTask::block(self);