Fix random bugs and update mautrix-python

mautrix_telegram/portal/telegram.py

@@ -455,8 +455,11 @@ class PortalTelegram(BasePortal, ABC):
                                                else self.tgid))
         min_id = last.tgid if last else 0
         if last_id is None:
-            message = (await source.client.get_messages(self.peer, limit=1))[0]
+            messages = await source.client.get_messages(self.peer, limit=1)
-            last_id = message.id
+            if not messages:
+                # The chat seems empty
+                return
+            last_id = messages[0].id
         if last_id <= min_id:
             # Nothing to backfill
             return

mautrix_telegram/puppet.py

@@ -262,7 +262,7 @@ class Puppet(BasePuppet):
             allow_because = "user is bot"
         elif self.displayname_source == source.tgid:
             allow_because = "user is the primary source"
-        elif not info.contact:
+        elif not isinstance(info, UpdateUserName) and not info.contact:
             allow_because = "user is not a contact"
         elif self.displayname_source is None:
             allow_because = "no primary source set"

requirements.txt

@@ -5,6 +5,6 @@ python-magic>=0.4,<0.5
 commonmark>=0.8,<0.10
 aiohttp>=3,<3.7
 yarl<1.6
-mautrix==0.8.0.beta10
+mautrix==0.8.0rc1
 telethon>=1.17,<1.18
 telethon-session-sqlalchemy>=0.2.14,<0.3