Print out which queue was corrupted

When the redzone code catches corruption, it used to just fail with
little extra info on what went wrong.  Propegate that error up 1 layer
so we can crash with the channel name.

Change-Id: I6d7fbf808ca616abaf4d680abcf958c5d024829d
diff --git a/aos/events/shm_event_loop.cc b/aos/events/shm_event_loop.cc
index 406325d..04d139f 100644
--- a/aos/events/shm_event_loop.cc
+++ b/aos/events/shm_event_loop.cc
@@ -537,9 +537,12 @@
     CHECK_LE(length, static_cast<size_t>(channel()->max_size()))
         << ": Sent too big a message on "
         << configuration::CleanedChannelToString(channel());
-    lockless_queue_sender_.Send(
+    CHECK(lockless_queue_sender_.Send(
         length, monotonic_remote_time, realtime_remote_time, remote_queue_index,
-        &monotonic_sent_time_, &realtime_sent_time_, &sent_queue_index_);
+        &monotonic_sent_time_, &realtime_sent_time_, &sent_queue_index_))
+        << ": Somebody wrote outside the buffer of their message on channel "
+        << configuration::CleanedChannelToString(channel());
+
     wake_upper_.Wakeup(event_loop()->priority());
     return true;
   }
@@ -551,10 +554,12 @@
     CHECK_LE(length, static_cast<size_t>(channel()->max_size()))
         << ": Sent too big a message on "
         << configuration::CleanedChannelToString(channel());
-    lockless_queue_sender_.Send(reinterpret_cast<const char *>(msg), length,
+    CHECK(lockless_queue_sender_.Send(reinterpret_cast<const char *>(msg), length,
                                 monotonic_remote_time, realtime_remote_time,
                                 remote_queue_index, &monotonic_sent_time_,
-                                &realtime_sent_time_, &sent_queue_index_);
+                                &realtime_sent_time_, &sent_queue_index_))
+        << ": Somebody wrote outside the buffer of their message on channel "
+        << configuration::CleanedChannelToString(channel());
     wake_upper_.Wakeup(event_loop()->priority());
     // TODO(austin): Return an error if we send too fast.
     return true;