diff --git a/src/test/bench/graph500-bfs.rs b/src/test/bench/graph500-bfs.rs
index 774e0b2e53a..bd5ce036bb2 100644
--- a/src/test/bench/graph500-bfs.rs
+++ b/src/test/bench/graph500-bfs.rs
@@ -188,7 +188,7 @@ fn bfs2(graph: graph, key: node_id) -> bfs_result {
               white => {
                 let i = i as node_id;
 
-                let neighbors = graph[i];
+                let neighbors = copy graph[i];
 
                 let mut color = white;
 
@@ -269,7 +269,7 @@ fn pbfs(&&graph: arc::ARC<graph>, key: node_id) -> bfs_result {
                   white => {
                     let i = i as node_id;
 
-                    let neighbors = graph[i];
+                    let neighbors = copy graph[i];
 
                     let mut color = white;
 
@@ -438,7 +438,7 @@ fn main() {
 
         if do_sequential {
             let start = time::precise_time_s();
-            let bfs_tree = bfs(graph, *root);
+            let bfs_tree = bfs(copy graph, *root);
             let stop = time::precise_time_s();
             
             //total_seq += stop - start;
@@ -449,7 +449,7 @@ fn main() {
             
             if do_validate {
                 let start = time::precise_time_s();
-                assert(validate(edges, *root, bfs_tree));
+                assert(validate(copy edges, *root, bfs_tree));
                 let stop = time::precise_time_s();
                 
                 io::stdout().write_line(
@@ -458,7 +458,7 @@ fn main() {
             }
             
             let start = time::precise_time_s();
-            let bfs_tree = bfs2(graph, *root);
+            let bfs_tree = bfs2(copy graph, *root);
             let stop = time::precise_time_s();
             
             total_seq += stop - start;
@@ -469,7 +469,7 @@ fn main() {
             
             if do_validate {
                 let start = time::precise_time_s();
-                assert(validate(edges, *root, bfs_tree));
+                assert(validate(copy edges, *root, bfs_tree));
                 let stop = time::precise_time_s();
                 
                 io::stdout().write_line(
@@ -489,7 +489,7 @@ fn main() {
 
         if do_validate {
             let start = time::precise_time_s();
-            assert(validate(edges, *root, bfs_tree));
+            assert(validate(copy edges, *root, bfs_tree));
             let stop = time::precise_time_s();
             
             io::stdout().write_line(fmt!("Validation completed in %? seconds.",
diff --git a/src/test/bench/shootout-chameneos-redux.rs b/src/test/bench/shootout-chameneos-redux.rs
index 3625dd048b5..c842402c70b 100644
--- a/src/test/bench/shootout-chameneos-redux.rs
+++ b/src/test/bench/shootout-chameneos-redux.rs
@@ -132,7 +132,7 @@ fn creature(
 
 fn rendezvous(nn: uint, set: ~[color]) {
 
-    pub fn spawn_listener<A: Send>(+f: fn~(oldcomm::Port<A>)) -> oldcomm::Chan<A> {
+    pub fn spawn_listener<A: Owned>(+f: fn~(oldcomm::Port<A>)) -> oldcomm::Chan<A> {
         let setup_po = oldcomm::Port();
         let setup_ch = oldcomm::Chan(&setup_po);
         do task::spawn |move f| {
diff --git a/src/test/bench/shootout-fasta.rs b/src/test/bench/shootout-fasta.rs
index c79ca214f44..4a03ab6ae65 100644
--- a/src/test/bench/shootout-fasta.rs
+++ b/src/test/bench/shootout-fasta.rs
@@ -55,7 +55,7 @@ fn make_random_fasta(wr: io::Writer, id: ~str, desc: ~str, genelist: ~[aminoacid
     let mut op: ~str = ~"";
     for uint::range(0u, n as uint) |_i| {
         str::push_char(&mut op, select_random(myrandom_next(rng, 100u32),
-                                              genelist));
+                                              copy genelist));
         if str::len(op) >= LINE_LENGTH() {
             wr.write_line(op);
             op = ~"";
diff --git a/src/test/bench/shootout-k-nucleotide-pipes.rs b/src/test/bench/shootout-k-nucleotide-pipes.rs
index 2420a02aa23..99b9b4a55f5 100644
--- a/src/test/bench/shootout-k-nucleotide-pipes.rs
+++ b/src/test/bench/shootout-k-nucleotide-pipes.rs
@@ -59,7 +59,7 @@ fn sort_and_fmt(mm: HashMap<~[u8], uint>, total: uint) -> ~str {
    let mut buffer = ~"";
 
    for pairs_sorted.each |kv| {
-       let (k,v) = *kv;
+       let (k,v) = copy *kv;
        unsafe {
            buffer += (fmt!("%s %0.3f\n", str::to_upper(str::raw::from_bytes(k)), v));
        }
@@ -198,7 +198,7 @@ fn main() {
             let line_bytes = str::to_bytes(line);
 
            for sizes.eachi |ii, _sz| {
-               let mut lb = line_bytes;
+               let mut lb = copy line_bytes;
                to_child[ii].send(lb);
             }
          }
diff --git a/src/test/bench/task-perf-word-count-generic.rs b/src/test/bench/task-perf-word-count-generic.rs
index 5c09248b59c..56257aa305e 100644
--- a/src/test/bench/task-perf-word-count-generic.rs
+++ b/src/test/bench/task-perf-word-count-generic.rs
@@ -164,7 +164,7 @@ mod map_reduce {
             let ctrl = box(move ctrl);
             let i = copy *i;
             let m = copy *map;
-            tasks.push(spawn_joinable(|move ctrl, move i| map_task(m, &ctrl, i)));
+            tasks.push(spawn_joinable(|move ctrl, move i| map_task(copy m, &ctrl, i)));
             ctrls.push(move ctrl_server);
         }
         move tasks