From 206becbb9fd308b3a86fbe0e1570f468cd495136 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Sat, 23 Jul 2022 14:52:42 +0300
Subject: [PATCH] Safely traverse map.

---
 td/telegram/DownloadManager.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/td/telegram/DownloadManager.cpp b/td/telegram/DownloadManager.cpp
index 202a0272a..e6937b641 100644
--- a/td/telegram/DownloadManager.cpp
+++ b/td/telegram/DownloadManager.cpp
@@ -93,8 +93,18 @@ class DownloadManagerImpl final : public DownloadManager {
   Status toggle_all_is_paused(bool is_paused) final {
     TRY_STATUS(check_is_active());
 
+    vector<FileId> to_toggle;
     for (auto &it : files_) {
-      toggle_is_paused(*it.second, is_paused);
+      FileInfo &file_info = *it.second;
+      if (!is_completed(file_info) && is_paused != file_info.is_paused) {
+        to_toggle.push_back(file_info.file_id);
+      }
+    }
+    for (auto file_id : to_toggle) {
+      auto r_file_info_ptr = get_file_info(file_id);
+      if (r_file_info_ptr.is_ok()) {
+        toggle_is_paused(*r_file_info_ptr.ok(), is_paused);
+      }
     }
 
     return Status::OK();