This PR fixes #194

pyrogram/methods/chats/get_dialogs.py

@@ -20,7 +20,7 @@
 from typing import AsyncGenerator, Optional
 
 import pyrogram
-from pyrogram import types, raw, utils
+from pyrogram import raw, types, utils
 
 
 class GetDialogs:
@@ -58,19 +58,21 @@ async def get_dialogs(
         """
         current = 0
         total = limit or (1 << 31) - 1
-        limit = min(100, total)
+        request_limit = min(100, total)
 
         offset_date = 0
         offset_id = 0
         offset_peer = raw.types.InputPeerEmpty()
 
+        seen_dialog_ids = set()
+
         while True:
             r = await self.invoke(
                 raw.functions.messages.GetDialogs(
                     offset_date=offset_date,
                     offset_id=offset_id,
                     offset_peer=offset_peer,
-                    limit=limit,
+                    limit=request_limit,
                     hash=0,
                     exclude_pinned=not pinned_only,
                     folder_id=chat_list
@@ -102,22 +104,34 @@ async def get_dialogs(
                 if not isinstance(dialog, raw.types.Dialog):
                     continue
 
-                dialogs.append(types.Dialog._parse(self, dialog, messages, users, chats))
+                parsed = types.Dialog._parse(self, dialog, messages, users, chats)
+                if parsed is None:
+                    continue
+
+                if parsed.chat is None:
+                    continue
+
+                if parsed.chat.id in seen_dialog_ids:
+                    continue
+
+                seen_dialog_ids.add(parsed.chat.id)
+                dialogs.append(parsed)
 
             if not dialogs:
                 return
 
             last = dialogs[-1]
 
+            if last.top_message is None:
+                return
+
             offset_id = last.top_message.id
             offset_date = utils.datetime_to_timestamp(last.top_message.date)
             offset_peer = await self.resolve_peer(last.chat.id)
 
             for dialog in dialogs:
                 await sleep(0)
                 yield dialog
-
                 current += 1
-
                 if current >= total:
                     return