From cc0532a4bf328478d508242d830433a33c4f22b2 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Fri, 6 Feb 2015 15:16:26 +0000
Subject: [PATCH] Explicitly list the RejectedReasons that we can prove

---
 synapse/handlers/federation.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index b13b7c7701..0f9c82fd06 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -860,9 +860,14 @@ class FederationHandler(BaseHandler):
             # Only do auth resolution if we have something new to say.
             # We can't rove an auth failure.
             do_resolution = False
+
+            provable = [
+                RejectedReason.NOT_ANCESTOR, RejectedReason.NOT_ANCESTOR,
+            ]
+
             for e_id in different_auth:
                 if e_id in have_events:
-                    if have_events[e_id] != RejectedReason.AUTH_ERROR:
+                    if have_events[e_id] in provable:
                         do_resolution = True
                         break