collections: Implement vec::drain(range) according to RFC 574

Old `.drain()` on vec is performed using `.drain(..)` now.

`.drain(range)` is unstable and under feature(collections_drain)

[breaking-change]

1 files changed, 3 insertions, 1 deletions

diff --git a/src/test/run-pass/sync-send-iterators-in-libcollections.rs b/src/test/run-pass/sync-send-iterators-in-libcollections.rs
index 447b4de450b..d7877bff0cb 100644
--- a/src/test/run-pass/sync-send-iterators-in-libcollections.rs
+++ b/src/test/run-pass/sync-send-iterators-in-libcollections.rs
@@ -12,6 +12,7 @@
 
 #![allow(unused_mut)]
 #![feature(collections)]
+#![feature(collections_drain)]
 
 extern crate collections;
 
@@ -96,5 +97,6 @@ fn main() {
 
     all_sync_send!(VecMap::<usize>::new(), iter, iter_mut, drain, into_iter, keys, values);
 
-    all_sync_send!(Vec::<usize>::new(), into_iter, drain);
+    all_sync_send!(Vec::<usize>::new(), into_iter);
+    is_sync_send!(Vec::<usize>::new(), drain(..));
 }