---

yaml
---
r: 118583
b: refs/heads/try
c: 01dc27a
h: refs/heads/master
i:
  118581: a8e7d01
  118579: 0e4b921
  118575: 6a5a3c6
v: v3

Author: alexcrichton

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: b1646cbfd908dc948b251e362669af421100647a
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: d6736a1440d42f6af967a8a20ab8d73522112b72
-refs/heads/try: 0439162d597d4abfebf93096e71ff45242efe6f0
+refs/heads/try: 01dc27a219435714ec38d0a2ddd1594d96e4da72
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c

branches/try/src/libstd/sync/future.rs

@@ -132,7 +132,8 @@ impl<A:Send> Future<A> {
         let (tx, rx) = channel();
 
         spawn(proc() {
-            tx.send(blk());
+            // Don't fail if the other end has hung up
+            let _ = tx.send_opt(blk());
         });
 
         Future::from_receiver(rx)
@@ -144,6 +145,7 @@ mod test {
     use prelude::*;
     use sync::Future;
     use task;
+    use comm::{channel, Sender};
 
     #[test]
     fn test_from_value() {
@@ -206,4 +208,28 @@ mod test {
             assert_eq!(actual, expected);
         });
     }
+
+    #[test]
+    fn test_dropped_future_doesnt_fail() {
+        struct Bomb(Sender<bool>);
+
+        local_data_key!(LOCAL: Bomb)
+
+        impl Drop for Bomb {
+            fn drop(&mut self) {
+                let Bomb(ref tx) = *self;
+                tx.send(task::failing());
+            }
+        }
+
+        // Spawn a future, but drop it immediately. When we receive the result
+        // later on, we should never view the task as having failed.
+        let (tx, rx) = channel();
+        drop(Future::spawn(proc() {
+            LOCAL.replace(Some(Bomb(tx)));
+        }));
+
+        // Make sure the future didn't fail the task.
+        assert!(!rx.recv());
+    }
 }