Do not pass taskpointers to "rust" native functions

Issue #466

Author: marijnh

src/comp/middle/trans.rs

@@ -5762,7 +5762,7 @@ fn register_native_fn(ccx: @crate_ctxt, sp: span, path: [str], name: str,
     let cast_to_i32;
     alt abi {
       ast::native_abi_rust. {
-        pass_task = true;
+        pass_task = false;
         uses_retptr = false;
         cast_to_i32 = true;
       }

src/lib/run_program.rs

@@ -114,9 +114,9 @@ fn program_output(prog: str, args: [str]) ->
    {status: int, out: str, err: str} {
     let pr = start_program(prog, args);
     pr.close_input();
-    ret {status: pr.finish(),
-         out: read_all(pr.output()),
-         err: read_all(pr.err())};
+    let out = read_all(pr.output());
+    let err = read_all(pr.err());
+    ret {status: pr.finish(), out: out, err: err};
 }
 
 /* Returns an exit status */

src/lib/task.rs

@@ -38,7 +38,6 @@ native "rust" mod rustrt {
     fn new_task() -> task_id;
     fn drop_task(task: *rust_task);
     fn get_task_pointer(id: task_id) -> *rust_task;
-    fn get_task_trampoline() -> u32;
 
     fn migrate_alloc(alloc: *u8, target: task_id);
     fn start_task(id: task_id, closure: *u8);