Remove unsafe non-const NetQuery accessors.

td/telegram/PhoneNumberManager.cpp

@@ -244,7 +244,7 @@ void PhoneNumberManager::on_result(NetQueryPtr result) {
     net_query_type_ = NetQueryType::None;
     if (result->is_error()) {
       if (query_id_ != 0) {
-        on_query_error(std::move(result->error()));
+        on_query_error(result->move_as_error());
       }
       return;
     }

td/telegram/Td.cpp

@@ -3104,14 +3104,16 @@ void Td::on_result(NetQueryPtr query) {
   if (handler != nullptr) {
     CHECK(query->is_ready());
     if (query->is_ok()) {
-      handler->on_result(std::move(query->ok()));
+      handler->on_result(query->move_as_ok());
     } else {
-      handler->on_error(std::move(query->error()));
+      handler->on_error(query->move_as_error());
     }
-  } else if (!query->is_ok() || query->ok_tl_constructor() != telegram_api::upload_file::ID) {
+  } else {
-    LOG(WARNING) << query << " is ignored: no handlers found";
+    if (!query->is_ok() || query->ok_tl_constructor() != telegram_api::upload_file::ID) {
+      LOG(WARNING) << query << " is ignored: no handlers found";
+    }
+    query->clear();
   }
-  query->clear();
 }
 
 void Td::on_connection_state_changed(ConnectionState new_state) {

td/telegram/net/NetQuery.h

@@ -95,25 +95,15 @@ class NetQuery final : public TsListNode<NetQueryDebug> {
     resend(dc_id_);
   }
 
-  BufferSlice &query() {
+  const BufferSlice &query() const {
     return query_;
   }
 
-  BufferSlice &ok() {
-    CHECK(state_ == State::OK);
-    return answer_;
-  }
-
   const BufferSlice &ok() const {
     CHECK(state_ == State::OK);
     return answer_;
   }
 
-  Status &error() {
-    CHECK(state_ == State::Error);
-    return status_;
-  }
-
   const Status &error() const {
     CHECK(state_ == State::Error);
     return status_;
@@ -124,6 +114,7 @@ class NetQuery final : public TsListNode<NetQueryDebug> {
     clear();
     return ok;
   }
+
   Status move_as_error() TD_WARN_UNUSED_RESULT {
     auto status = std::move(status_);
     clear();

td/telegram/net/NetQueryDelayer.cpp

@@ -58,7 +58,7 @@ void NetQueryDelayer::delay(NetQueryPtr query) {
   query->last_timeout_ = timeout;
   LOG(INFO) << "Set total_timeout to " << query->total_timeout_ << " for " << query->id();
 
-  auto error = query->error().move_as_error();
+  auto error = query->error().clone();
   query->resend();
 
   // Fix for infinity flood control

td/telegram/net/Session.cpp

@@ -391,7 +391,7 @@ void Session::on_bind_result(NetQueryPtr query) {
 
   Status status;
   if (query->is_error()) {
-    status = std::move(query->error());
+    status = query->move_as_error();
     if (status.code() == 400 && status.message() == "ENCRYPTED_MESSAGE_INVALID") {
       auto server_time = G()->server_time();
       auto auth_key_creation_date = auth_data_.get_main_auth_key().created_at();
@@ -424,7 +424,8 @@ void Session::on_bind_result(NetQueryPtr query) {
       }
     }
   } else {
-    auto r_flag = fetch_result<telegram_api::auth_bindTempAuthKey>(query->ok());
+    auto answer = query->move_as_ok();
+    auto r_flag = fetch_result<telegram_api::auth_bindTempAuthKey>(answer);
     if (r_flag.is_error()) {
       status = r_flag.move_as_error();
     } else if (!r_flag.ok()) {
@@ -444,7 +445,6 @@ void Session::on_bind_result(NetQueryPtr query) {
     connection_close(&long_poll_connection_);
   }
 
-  query->clear();
   yield();
 }
 
@@ -455,9 +455,10 @@ void Session::on_check_key_result(NetQueryPtr query) {
 
   Status status;
   if (query->is_error()) {
-    status = std::move(query->error());
+    status = query->move_as_error();
   } else {
-    auto r_flag = fetch_result<telegram_api::help_getNearestDc>(query->ok());
+    auto answer = query->move_as_ok();
+    auto r_flag = fetch_result<telegram_api::help_getNearestDc>(answer);
     if (r_flag.is_error()) {
       status = r_flag.move_as_error();
     }
@@ -472,7 +473,6 @@ void Session::on_check_key_result(NetQueryPtr query) {
     connection_close(&long_poll_connection_);
   }
 
-  query->clear();
   yield();
 }