std: Fix stage0 build

Conflicts:
	src/libstd/rt/comm.rs

Author: brson

src/libstd/rt/comm.rs

@@ -399,6 +399,12 @@ impl<T: Owned> GenericChan<T> for SharedChan<T> {
 }
 
 impl<T: Owned> GenericSmartChan<T> for SharedChan<T> {
+    #[cfg(stage0)] // odd type checking errors
+    fn try_send(&self, _val: T) -> bool {
+        fail!()
+    }
+
+    #[cfg(not(stage0))]
     fn try_send(&self, val: T) -> bool {
         unsafe {
             let (next_pone, next_cone) = oneshot();
@@ -442,6 +448,12 @@ impl<T: Owned> GenericPort<T> for SharedPort<T> {
         }
     }
 
+    #[cfg(stage0)] // odd type checking errors
+    fn try_recv(&self) -> Option<T> {
+        fail!()
+    }
+
+    #[cfg(not(stage0))]
     fn try_recv(&self) -> Option<T> {
         unsafe {
             let (next_link_port, next_link_chan) = oneshot();