auto merge of #12705 : alexcrichton/rust/issue-12692, r=brson

Details are in the commit messages, but this closes a few issues seen with `libnative` recently.

src/test/run-pass/issue-12684.rs

@@ -0,0 +1,28 @@
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-fast
+
+extern crate native;
+extern crate green;
+extern crate rustuv;
+
+#[start]
+fn start(argc: int, argv: **u8) -> int { green::start(argc, argv, main) }
+
+fn main() {
+    native::task::spawn(proc() customtask());
+}
+
+fn customtask() {
+    let mut timer = std::io::timer::Timer::new().unwrap();
+    let periodic = timer.periodic(10);
+    periodic.recv();
+}

src/test/run-pass/issue-12699.rs

@@ -0,0 +1,24 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-fast
+
+extern crate native;
+
+use std::io::timer;
+
+#[start]
+fn start(argc: int, argv: **u8) -> int {
+    native::start(argc, argv, main)
+}
+
+fn main() {
+    timer::sleep(250);
+}