From a7c963dabbb409d45cddb5d3be5f0b911f4f9088 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Fri, 5 May 2023 12:51:48 +0300
Subject: [PATCH] Add OrderedMessage::Iterator::clear.

---
 td/telegram/MessagesManager.cpp | 4 ++--
 td/telegram/OrderedMessage.h    | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index faad07d05..6605f1e68 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -21021,7 +21021,7 @@ tl_object_ptr<td_api::messages> MessagesManager::get_dialog_history(DialogId dia
     limit += offset;
     offset = 0;
     if (d->last_message_id == MessageId()) {
-      p = OrderedMessages::ConstIterator();
+      p.clear();
     }
   } else {
     bool have_a_gap = false;
@@ -21051,7 +21051,7 @@ tl_object_ptr<td_api::messages> MessagesManager::get_dialog_history(DialogId dia
 
     if (have_a_gap) {
       LOG(INFO) << "Have a gap near message to get chat history from";
-      p = OrderedMessages::ConstIterator();
+      p.clear();
     }
     if (*p != nullptr && (*p)->get_message_id() == from_message_id) {
       if (offset < 0) {
diff --git a/td/telegram/OrderedMessage.h b/td/telegram/OrderedMessage.h
index b36e86024..3d08b027f 100644
--- a/td/telegram/OrderedMessage.h
+++ b/td/telegram/OrderedMessage.h
@@ -136,6 +136,10 @@ class OrderedMessages {
         cur = cur->right_.get();
       }
     }
+
+    void clear() {
+      stack_.clear();
+    }
   };
 
   class ConstIterator final : public IteratorBase {