Fix select() in light of the deschedule...and then race. Close #8347.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libstd/rt/comm.rs b/src/libstd/rt/comm.rs
index f43d1c74eae..42d59ccdf95 100644
--- a/src/libstd/rt/comm.rs
+++ b/src/libstd/rt/comm.rs
@@ -114,7 +114,9 @@ impl<T> ChanOne<T> {
     // 'do_resched' configures whether the scheduler immediately switches to
     // the receiving task, or leaves the sending task still running.
     fn try_send_inner(self, val: T, do_resched: bool) -> bool {
-        rtassert!(!rt::in_sched_context());
+        if do_resched {
+            rtassert!(!rt::in_sched_context());
+        }
 
         let mut this = self;
         let mut recvr_active = true;