From 110ff312dfa15fff3457d826302ef575ead0089a Mon Sep 17 00:00:00 2001
From: Eric Holk <eric.holk@gmail.com>
Date: Thu, 2 Aug 2012 15:40:36 -0700
Subject: [PATCH] Give better error messages when port_set.recv fails.

---
 src/libcore/pipes.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/libcore/pipes.rs b/src/libcore/pipes.rs
index bc8785b45acf..7fb1aabb1fe4 100644
--- a/src/libcore/pipes.rs
+++ b/src/libcore/pipes.rs
@@ -899,7 +899,10 @@ struct port_set<T: send> : recv<T> {
     }
 
     fn recv() -> T {
-        option::unwrap(self.try_recv())
+        match move self.try_recv() {
+            some(x) { move x }
+            none { fail ~"port_set: endpoints closed" }
+        }
     }
 
     pure fn peek() -> bool {