Bridging sticker fails if emoji related to sticker doesn't have unicodedata name

[tulir]

[2018-12-11 22:37:37,472] [[email protected]] Handling message Message(id=X, to_id=PeerChat(chat_id=X), date=datetime.datetime(2018, 12, 11, X, X, X, tzinfo=datetime.timezone.utc), message='', out=True, mentioned=False, media_unread=False, silent=False, post=False, from_id=X, fwd_from=None, via_bot_id=None, reply_to_msg_id=None, media=MessageMediaDocument(document=Document(id=X, access_hash=X, date=datetime.datetime(2018, X, X, X, X, X, tzinfo=datetime.timezone.utc), mime_type='image/webp', size=X, thumb=PhotoSize(type='s', location=FileLocation(dc_id=X, volume_id=X, local_id=X, secret=X), w=X, h=X, size=X), dc_id=X, version=0, attributes=[DocumentAttributeImageSize(w=X, h=X), DocumentAttributeSticker(alt='\U0001f9d0', stickerset=InputStickerSetID(id=X, access_hash=X), mask=False, mask_coords=None), DocumentAttributeFilename(file_name='sticker.webp')]), ttl_seconds=None), reply_markup=None, entities=[], views=None, edit_date=None, post_author=None, grouped_id=None) to X by X
[2018-12-11 22:37:37,475] [[email protected]] Failed to handle Telegram update
Traceback (most recent call last):
  File "mautrix_telegram/abstract_user.py", line 133, in _update_catch
    await self._update(update)
  File "mautrix_telegram/abstract_user.py", line 189, in _update
    await self.update_message(update)
  File "mautrix_telegram/abstract_user.py", line 382, in update_message
    return await portal.handle_telegram_message(self, sender, update)
  File "mautrix_telegram/portal.py", line 1504, in handle_telegram_message
    response = await self.handle_telegram_document(source, intent, evt, relates_to)
  File "mautrix_telegram/portal.py", line 1343, in handle_telegram_document
    info, name = self._parse_telegram_document_meta(evt, file, attrs)
  File "mautrix_telegram/portal.py", line 1306, in _parse_telegram_document_meta
    name = f"{alt} ({unicodedata.name(alt[0]).lower()})"
ValueError: no such name

>>> unicodedata.name("🧐")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: no such name