gistfile1.txt

Before:

```
        match bv {
          env_copy(val, ty, lv_owned) => {
            let val1 = load_if_immediate(bcx, val, ty);
            bcx = base::copy_val(bcx, INIT, bound_data, val1, ty);
          }
          env_copy(val, ty, lv_owned_imm) => {
            bcx = base::copy_val(bcx, INIT, bound_data, val, ty);
          }
          env_copy(_, _, lv_temporary) => {
            fail ~"cannot capture temporary upvar";
          }
          env_move(val, ty, kind) => {
            let src = {bcx:bcx, val:val, kind:kind};
            bcx = move_val(bcx, INIT, bound_data, src, ty);
          }
          env_ref(val, _, lv_owned) => {
            debug!("> storing %s into %s",
                   val_str(bcx.ccx().tn, val),
                   val_str(bcx.ccx().tn, bound_data));
            Store(bcx, val, bound_data);
          }
          env_ref(val, _, lv_owned_imm) => {
            let addr = do_spill_noroot(bcx, val);
            Store(bcx, addr, bound_data);
          }
          env_ref(_, _, lv_temporary) => {
            fail ~"cannot capture temporary upvar";
          }
        }
```

After:

```
        match bv.action {
            EnvCopy => {
                bcx = bv.datum.copy_to(bcx, INIT, bound_data);
            }
            EnvMove => {
                bcx = bv.datum.move_to(bcx, INIT, bound_data);
            }
            EnvRef => {
                assert bv.datum.mode == datum::ByRef;
                Store(bcx, bv.datum.val, bound_data);
            }
        }
```