From 8915f0c0c9806c4f737565182a9fa15819bebec0 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Sun, 1 May 2022 19:12:48 -0400
Subject: [PATCH] Terminate early on data unavailable errors

---
 piker/data/feed.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/piker/data/feed.py b/piker/data/feed.py
index 88bf8810..eb57e71b 100644
--- a/piker/data/feed.py
+++ b/piker/data/feed.py
@@ -323,7 +323,7 @@ async def start_backfill(
                 # broker is being a bish and we can't pull
                 # any more..
                 log.warning('backend halted on data deliver !?!?')
-                # break
+                return input_end_dt, None
 
             to_push = diff_history(
                 array,
@@ -361,6 +361,11 @@ async def start_backfill(
             # Then iterate over the return values, as they become available
             # (i.e., not necessarily in the original order)
             async for input_end_dt, outcome in outcomes:
+
+                # no data available case..
+                if outcome is None:
+                    break
+
                 try:
                     out = outcome.unwrap()
                 except Exception: