ICE with &FSyncable (all the gory details)

gistfile1.txt

kunix:rust $ git diff
diff --git a/src/libcore/io.rs b/src/libcore/io.rs
index 046d155..7f437cf 100644
--- a/src/libcore/io.rs
+++ b/src/libcore/io.rs
@@ -4,6 +4,9 @@ Module: io
 Basic input/output
 */
 
+#[forbid(deprecated_mode)];
+#[forbid(deprecated_pattern)];
+
 import result::result;
 
 import dvec::{DVec, dvec};
@@ -812,10 +815,10 @@ mod fsync {
     trait FSyncable { fn fsync(l: Level) -> int; }
 
     // Call o.fsync after executing blk
-    fn obj_sync(&&o: FSyncable, opt_level: option<Level>,
+    fn obj_sync(o: &FSyncable, opt_level: option<Level>,
                 blk: fn(&&Res<FSyncable>)) {
         blk(Res({
-            val: o, opt_level: opt_level,
+            val: *o, opt_level: opt_level,
             fsync_fn: fn@(&&o: FSyncable, l: Level) -> int {
                 return o.fsync(l);
             }
kunix:rust $ 
kunix:rust $ 
kunix:rust $ 
kunix:rust $ make
cfg: shell host triple x86_64-unknown-linux-gnu
cfg: host for x86_64-unknown-linux-gnu is x86_64
cfg: unix-y environment
cfg: using gcc
cfg: no llnextgen found, omitting grammar-verification
compile_and_link: x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/libcore.so
/code/rust/src/libcore/io.rs:818:20: 818:29 error: internal compiler error: unimplemented `~trait` and `&trait` are unimplemented; use `@trait` instead for now
/code/rust/src/libcore/io.rs:818     fn obj_sync(o: &FSyncable, opt_level: option<Level>,
                                                     ^~~~~~~~~
make: *** [x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/libcore.so] Error 101
kunix:rust $