From ed56a75b8aba26d16470e7001d5916443df9612f Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Sun, 14 Nov 2021 09:05:33 +0300
Subject: [PATCH] Check sticker pointer before use.

---
 td/telegram/StickersManager.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index 3012bb53caa2..24c0ac32d52e 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -3173,6 +3173,7 @@ vector<FileId> StickersManager::get_stickers(string emoji, int32 limit, bool for
     auto prefer_animated = [this](FileId lhs, FileId rhs) {
       const Sticker *lhs_s = get_sticker(lhs);
       const Sticker *rhs_s = get_sticker(rhs);
+      CHECK(lhs_s != nullptr && rhs_s != nullptr);
       return lhs_s->is_animated && !rhs_s->is_animated;
     };
     // std::stable_sort(prepend_sticker_ids.begin(), prepend_sticker_ids.begin() + recent_sticker_ids_[0].size(),
@@ -3183,6 +3184,7 @@ vector<FileId> StickersManager::get_stickers(string emoji, int32 limit, bool for
     LOG(INFO) << "Have " << recent_sticker_ids_[0] << " recent and " << favorite_sticker_ids_ << " favorite stickers";
     for (const auto &sticker_id : prepend_sticker_ids) {
       const Sticker *s = get_sticker(sticker_id);
+      CHECK(s != nullptr);
       LOG(INFO) << "Have prepend sticker " << sticker_id << " from " << s->set_id;
       if (s->set_id.is_valid() && !td::contains(sets_to_load, s->set_id)) {
         const StickerSet *sticker_set = get_sticker_set(s->set_id);
@@ -3269,6 +3271,7 @@ vector<FileId> StickersManager::get_stickers(string emoji, int32 limit, bool for
         is_good = true;
       } else {
         const Sticker *s = get_sticker(sticker_id);
+        CHECK(s != nullptr);
         if (remove_emoji_modifiers(s->alt) == emoji) {
           LOG(INFO) << "Found prepend sticker " << sticker_id << " main emoji matches";
           is_good = true;