Removed unused MTP::Error from callbacks on fail.

Telegram/SourceFiles/api/api_attached_stickers.cpp

@@ -59,7 +59,7 @@ void AttachedStickers::request(
 		strongController->show(
 			Box<StickerSetBox>(strongController, setId),
 			Ui::LayerOption::KeepOther);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 		if (const auto strongController = weak.get()) {
 			strongController->show(

Telegram/SourceFiles/api/api_authorizations.cpp

@@ -132,7 +132,7 @@ void Authorizations::reload() {
 			}) | ranges::to<List>;
 			_listChanges.fire({});
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }
@@ -196,7 +196,7 @@ void Authorizations::updateTTL(int days) {
 		MTP_int(days)
 	)).done([=](const MTPBool &result) {
 		_ttlRequestId = 0;
-	}).fail([=](const MTP::Error &result) {
+	}).fail([=] {
 		_ttlRequestId = 0;
 	}).send();
 	_ttlDays = days;
@@ -218,7 +218,7 @@ void Authorizations::toggleCallsDisabled(uint64 hash, bool disabled) {
 		MTP_bool(disabled)
 	)).done([=](const MTPBool &) {
 		_toggleCallsDisabledRequests.remove(hash);
-	}).fail([=](const MTP::Error &) {
+	}).fail([=] {
 		_toggleCallsDisabledRequests.remove(hash);
 	}).send();
 	_toggleCallsDisabledRequests.emplace(hash, id);

Telegram/SourceFiles/api/api_blocked_peers.cpp

@@ -90,7 +90,7 @@ void BlockedPeers::block(not_null<PeerData*> peer) {
 				++_slice->total;
 				_changes.fire_copy(*_slice);
 			}
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_blockRequests.erase(peer);
 		}).send();
 
@@ -128,7 +128,7 @@ void BlockedPeers::unblock(not_null<PeerData*> peer, Fn<void()> onDone) {
 		if (onDone) {
 			onDone();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_blockRequests.erase(peer);
 	}).send();
 	_blockRequests.emplace(peer, requestId);
@@ -165,7 +165,7 @@ void BlockedPeers::request(int offset, Fn<void(BlockedPeers::Slice)> onDone) {
 	)).done([=](const MTPcontacts_Blocked &result) {
 		_requestId = 0;
 		onDone(TLToSlice(result, _session->data()));
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }

Telegram/SourceFiles/api/api_chat_participants.cpp

@@ -387,7 +387,7 @@ void ChatParticipants::requestLast(not_null<ChannelData*> channel) {
 			LOG(("API Error: "
 				"channels.channelParticipantsNotModified received!"));
 		});
-	}).fail([this, channel](const MTP::Error &error) {
+	}).fail([this, channel] {
 		_participantsRequests.remove(channel);
 	}).send();
 
@@ -416,7 +416,7 @@ void ChatParticipants::requestBots(not_null<ChannelData*> channel) {
 			LOG(("API Error: "
 				"channels.channelParticipantsNotModified received!"));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_botsRequests.remove(channel);
 	}).send();
 
@@ -445,7 +445,7 @@ void ChatParticipants::requestAdmins(not_null<ChannelData*> channel) {
 			LOG(("API Error: "
 				"channels.channelParticipantsNotModified received!"));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_adminsRequests.remove(channel);
 	}).send();
 
@@ -638,7 +638,7 @@ void ChatParticipants::kick(
 
 		_kickRequests.remove(KickRequest(channel, participant));
 		channel->applyEditBanned(participant, currentRights, rights);
-	}).fail([this, kick](const MTP::Error &error) {
+	}).fail([this, kick] {
 		_kickRequests.remove(kick);
 	}).send();
 
@@ -666,7 +666,7 @@ void ChatParticipants::unblock(
 		} else {
 			channel->updateFullForced();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_kickRequests.remove(kick);
 	}).send();
 

Telegram/SourceFiles/api/api_cloud_password.cpp

@@ -36,17 +36,17 @@ void CloudPassword::reload() {
 			}
 			_stateChanges.fire_copy(*_state);
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }
 
 void CloudPassword::clearUnconfirmedPassword() {
 	_requestId = _api.request(MTPaccount_CancelPasswordEmail(
-	)).done([=](const MTPBool &result) {
+	)).done([=] {
 		_requestId = 0;
 		reload();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 		reload();
 	}).send();

Telegram/SourceFiles/api/api_global_privacy.cpp

@@ -33,7 +33,7 @@ void GlobalPrivacy::reload(Fn<void()> callback) {
 		for (const auto &callback : base::take(_callbacks)) {
 			callback();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 		for (const auto &callback : base::take(_callbacks)) {
 			callback();
@@ -86,7 +86,7 @@ void GlobalPrivacy::update(bool archiveAndMute) {
 	)).done([=](const MTPGlobalPrivacySettings &result) {
 		_requestId = 0;
 		apply(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 	_archiveAndMute = archiveAndMute;

Telegram/SourceFiles/api/api_invite_links.cpp

@@ -128,7 +128,7 @@ void InviteLinks::performCreate(
 				callback(link);
 			}
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_createCallbacks.erase(peer);
 	}).send();
 }
@@ -313,7 +313,7 @@ void InviteLinks::performEdit(
 				prepend(peer, admin, data.vnew_invite());
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_editCallbacks.erase(key);
 	}).send();
 }
@@ -375,7 +375,7 @@ void InviteLinks::destroy(
 			.admin = admin,
 			.was = key.link,
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_deleteCallbacks.erase(key);
 	}).send();
 }
@@ -405,7 +405,6 @@ void InviteLinks::destroyAllRevoked(
 			}
 		}
 		_allRevokedDestroyed.fire({ peer, admin });
-	}).fail([=](const MTP::Error &error) {
 	}).send();
 }
 
@@ -446,7 +445,7 @@ void InviteLinks::requestMyLinks(not_null<PeerData*> peer) {
 			i->second.count = std::max(slice.count, int(existing.size()));
 		}
 		notify(peer);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_firstSliceRequests.remove(peer);
 	}).send();
 	_firstSliceRequests.emplace(peer, requestId);
@@ -507,7 +506,7 @@ void InviteLinks::processRequest(
 				done();
 			}
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		if (const auto callbacks = _processRequests.take({ peer, user })) {
 			if (const auto &fail = callbacks->fail) {
 				fail();
@@ -608,7 +607,7 @@ void InviteLinks::requestJoinedFirstSlice(LinkKey key) {
 		_firstJoinedRequests.remove(key);
 		_firstJoined[key] = ParseJoinedByLinkSlice(key.peer, result);
 		_joinedFirstSliceLoaded.fire_copy(key);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_firstJoinedRequests.remove(key);
 	}).send();
 	_firstJoinedRequests.emplace(key, requestId);
@@ -771,7 +770,7 @@ void InviteLinks::requestMoreLinks(
 		MTP_int(kPerPage)
 	)).done([=](const MTPmessages_ExportedChatInvites &result) {
 		done(parseSlice(peer, result));
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		done(Links());
 	}).send();
 }

Telegram/SourceFiles/api/api_polls.cpp

@@ -150,7 +150,7 @@ void Polls::sendVotes(
 		_pollVotesRequestIds.erase(itemId);
 		hideSending();
 		_session->updates().applyUpdates(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_pollVotesRequestIds.erase(itemId);
 		hideSending();
 	}).send();
@@ -179,7 +179,7 @@ void Polls::close(not_null<HistoryItem*> item) {
 	)).done([=](const MTPUpdates &result) {
 		_pollCloseRequestIds.erase(itemId);
 		_session->updates().applyUpdates(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_pollCloseRequestIds.erase(itemId);
 	}).send();
 	_pollCloseRequestIds.emplace(itemId, requestId);
@@ -196,7 +196,7 @@ void Polls::reloadResults(not_null<HistoryItem*> item) {
 	)).done([=](const MTPUpdates &result) {
 		_pollReloadRequestIds.erase(itemId);
 		_session->updates().applyUpdates(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_pollReloadRequestIds.erase(itemId);
 	}).send();
 	_pollReloadRequestIds.emplace(itemId, requestId);

Telegram/SourceFiles/api/api_self_destruct.cpp

@@ -25,7 +25,7 @@ void SelfDestruct::reload() {
 		result.match([&](const MTPDaccountDaysTTL &data) {
 			_days = data.vdays().v;
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }
@@ -42,7 +42,7 @@ void SelfDestruct::update(int days) {
 		MTP_accountDaysTTL(MTP_int(days))
 	)).done([=](const MTPBool &result) {
 		_requestId = 0;
-	}).fail([=](const MTP::Error &result) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 	_days = days;

Telegram/SourceFiles/api/api_sensitive_content.cpp

@@ -36,7 +36,7 @@ void SensitiveContent::reload() {
 			_enabled = data.is_sensitive_enabled();
 			_canChange = data.is_sensitive_can_change();
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }
@@ -63,7 +63,7 @@ void SensitiveContent::update(bool enabled) {
 		MTP_flags(enabled ? Flag::f_sensitive_enabled : Flag(0))
 	)).done([=](const MTPBool &result) {
 		_requestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 	_enabled = enabled;

Telegram/SourceFiles/api/api_single_message_search.cpp

@@ -117,7 +117,7 @@ std::optional<HistoryItem*> SingleMessageSearch::performLookupByChannel(
 		} else {
 			fail();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		fail();
 	}).send();
 
@@ -154,7 +154,7 @@ std::optional<HistoryItem*> SingleMessageSearch::performLookupById(
 				fail();
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		fail();
 	}).send();
 
@@ -198,7 +198,7 @@ std::optional<HistoryItem*> SingleMessageSearch::performLookupByUsername(
 				fail();
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		fail();
 	}).send();
 

Telegram/SourceFiles/api/api_updates.cpp

@@ -769,7 +769,7 @@ void Updates::channelRangeDifferenceSend(
 	)).done([=](const MTPupdates_ChannelDifference &result) {
 		_rangeDifferenceRequests.remove(channel);
 		channelRangeDifferenceDone(channel, range, result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_rangeDifferenceRequests.remove(channel);
 	}).send();
 	_rangeDifferenceRequests.emplace(channel, requestId);
@@ -921,7 +921,7 @@ void Updates::updateOnline(crl::time lastNonIdleTime, bool gotOtherOffline) {
 				MTP_bool(!isOnline)
 			)).done([=](const MTPBool &result) {
 				Core::App().quitPreventFinished();
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				Core::App().quitPreventFinished();
 			}).send();
 		}

Telegram/SourceFiles/api/api_user_privacy.cpp

@@ -241,7 +241,7 @@ void UserPrivacy::save(
 			_privacySaveRequests.remove(keyTypeId);
 			apply(keyTypeId, data.vrules(), true);
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_privacySaveRequests.remove(keyTypeId);
 	}).send();
 
@@ -277,7 +277,7 @@ void UserPrivacy::reload(Key key) {
 			_session->data().processChats(data.vchats());
 			pushPrivacy(key, data.vrules());
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_privacyRequestIds.erase(key);
 	}).send();
 	_privacyRequestIds.emplace(key, requestId);

Telegram/SourceFiles/api/api_who_read.cpp

@@ -164,7 +164,7 @@ struct State {
 					peers.push_back(UserId(id));
 				}
 				entry.list = std::move(peers);
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				auto &entry = context->cache(item);
 				entry.requestId = 0;
 				if (ListUnknown(entry.list.current(), item)) {

Telegram/SourceFiles/apiwrap.cpp

@@ -226,7 +226,7 @@ void ApiWrap::refreshTopPromotion() {
 	)).done([=](const MTPhelp_PromoData &result) {
 		_topPromotionRequestId = 0;
 		topPromotionDone(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_topPromotionRequestId = 0;
 		const auto now = base::unixtime::now();
 		const auto next = _topPromotionNextRequestTime = now
@@ -276,7 +276,7 @@ void ApiWrap::requestDeepLinkInfo(
 		if (result.type() == mtpc_help_deepLinkInfo) {
 			callback(result.c_help_deepLinkInfo());
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_deepLinkInfoRequestId = 0;
 	}).send();
 }
@@ -323,7 +323,7 @@ void ApiWrap::requestTermsUpdate() {
 		} break;
 		default: Unexpected("Type in requestTermsUpdate().");
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_termsUpdateRequestId = 0;
 		_termsUpdateSendAt = crl::now() + kTermsUpdateTimeoutMin;
 		requestTermsUpdate();
@@ -455,7 +455,7 @@ void ApiWrap::toggleHistoryArchived(
 		if (isPinned) {
 			_session->data().notifyPinnedDialogsOrderUpdated();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_historyArchivedRequests.remove(history);
 	}).send();
 	_historyArchivedRequests.emplace(history, requestId, callback);
@@ -736,7 +736,7 @@ void ApiWrap::requestContacts() {
 			}
 		}
 		_session->data().contactsLoaded() = true;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_contactsRequestId = 0;
 	}).send();
 }
@@ -810,7 +810,7 @@ void ApiWrap::requestMoreDialogs(Data::Folder *folder) {
 		}
 		requestMoreDialogsIfNeeded();
 		_session->data().chatsListChanged(folder);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		dialogsLoadState(folder)->requestId = 0;
 	}).send();
 
@@ -955,7 +955,7 @@ void ApiWrap::requestPinnedDialogs(Data::Folder *folder) {
 			_session->data().chatsListChanged(folder);
 			_session->data().notifyPinnedDialogsOrderUpdated();
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		finalize();
 	}).send();
 }
@@ -1138,7 +1138,7 @@ void ApiWrap::requestPeer(not_null<PeerData*> peer) {
 	}
 
 	const auto requestId = [&] {
-		const auto failHandler = [=](const MTP::Error &error) {
+		const auto failHandler = [=] {
 			_peerRequests.remove(peer);
 		};
 		const auto chatHandler = [=](const MTPmessages_Chats &result) {
@@ -1183,7 +1183,7 @@ void ApiWrap::requestPeerSettings(not_null<PeerData*> peer) {
 			peer->setSettings(data.vsettings());
 			_requestedPeerSettings.erase(peer);
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestedPeerSettings.erase(peer);
 	}).send();
 }
@@ -1437,7 +1437,7 @@ void ApiWrap::requestStickerSets() {
 			MTP_int(0) // hash
 		)).done([=, setId = i.key()](const MTPmessages_StickerSet &result) {
 			gotStickerSet(setId, result);
-		}).fail([=, setId = i.key()](const MTP::Error &error) {
+		}).fail([=, setId = i.key()] {
 			_stickerSetRequests.remove(setId);
 		}).afterDelay(waitMs).send();
 	}
@@ -1480,7 +1480,7 @@ void ApiWrap::saveStickerSets(
 			MTP_vector<MTPlong>(mtpOrder)
 		)).done([=](const MTPBool &result) {
 			reorderRequestId() = 0;
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			reorderRequestId() = 0;
 			if (setsMasks) {
 				_session->data().stickers().setLastMasksUpdate(0);
@@ -1553,7 +1553,7 @@ void ApiWrap::saveStickerSets(
 				MTP_flags(flags)
 			)).done([=](const MTPBool &result) {
 				finish();
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				finish();
 			}).send();
 			continue;
@@ -1755,7 +1755,7 @@ void ApiWrap::leaveChannel(not_null<ChannelData*> channel) {
 		)).done([=](const MTPUpdates &result) {
 			_channelAmInRequests.remove(channel);
 			applyUpdates(result);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_channelAmInRequests.remove(channel);
 		}).send();
 
@@ -1797,7 +1797,7 @@ void ApiWrap::requestNotifySettings(const MTPInputNotifyPeer &peer) {
 	)).done([=](const MTPPeerNotifySettings &result) {
 		applyNotifySettings(peer, result);
 		_notifySettingRequests.erase(key);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		applyNotifySettings(
 			peer,
 			MTP_peerNotifySettings(
@@ -1879,7 +1879,7 @@ void ApiWrap::updatePrivacyLastSeens() {
 				}
 			}
 		}
-	}).fail([this](const MTP::Error &error) {
+	}).fail([this] {
 		_contactsStatusesRequestId = 0;
 	}).send();
 }
@@ -1913,7 +1913,7 @@ void ApiWrap::deleteConversation(not_null<PeerData*> peer, bool revoke) {
 		)).done([=](const MTPUpdates &result) {
 			applyUpdates(result);
 			deleteHistory(peer, false, revoke);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			deleteHistory(peer, false, revoke);
 		}).send();
 	} else {
@@ -2337,7 +2337,7 @@ void ApiWrap::requestFileReference(
 		for (auto &handler : handlers) {
 			handler(parsed);
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		const auto i = _fileReferenceHandlers.find(origin);
 		Assert(i != end(_fileReferenceHandlers));
 		auto handlers = std::move(i->second);
@@ -2590,7 +2590,7 @@ void ApiWrap::requestStickers(TimeId now) {
 	};
 	_stickersUpdateRequest = request(MTPmessages_GetAllStickers(
 		MTP_long(Api::CountStickersHash(_session, true))
-	)).done(done).fail([=](const MTP::Error &error) {
+	)).done(done).fail([=] {
 		LOG(("App Fail: Failed to get stickers!"));
 		done(MTP_messages_allStickersNotModified());
 	}).send();
@@ -2614,7 +2614,7 @@ void ApiWrap::requestMasks(TimeId now) {
 	};
 	_masksUpdateRequest = request(MTPmessages_GetMaskStickers(
 		MTP_long(Api::CountMasksHash(_session, true))
-	)).done(done).fail([=](const MTP::Error &error) {
+	)).done(done).fail([=] {
 		LOG(("App Fail: Failed to get masks!"));
 		done(MTP_messages_allStickersNotModified());
 	}).send();
@@ -2674,7 +2674,7 @@ void ApiWrap::requestRecentStickersWithHash(uint64 hash, bool attached) {
 		} return;
 		default: Unexpected("Type in ApiWrap::recentStickersDone()");
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		finish();
 
 		LOG(("App Fail: Failed to get recent stickers!"));
@@ -2705,7 +2705,7 @@ void ApiWrap::requestFavedStickers(TimeId now) {
 		} return;
 		default: Unexpected("Type in ApiWrap::favedStickersDone()");
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_session->data().stickers().setLastFavedUpdate(crl::now());
 		_favedStickersUpdateRequest = 0;
 
@@ -2735,7 +2735,7 @@ void ApiWrap::requestFeaturedStickers(TimeId now) {
 		} return;
 		default: Unexpected("Type in ApiWrap::featuredStickersDone()");
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_session->data().stickers().setLastFeaturedUpdate(crl::now());
 		_featuredStickersUpdateRequest = 0;
 
@@ -2764,7 +2764,7 @@ void ApiWrap::requestSavedGifs(TimeId now) {
 		} return;
 		default: Unexpected("Type in ApiWrap::savedGifsDone()");
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_session->data().stickers().setLastSavedGifsUpdate(crl::now());
 		_savedGifsUpdateRequest = 0;
 
@@ -2923,7 +2923,7 @@ void ApiWrap::preloadEnoughUnreadMentions(not_null<History*> history) {
 	auto requestId = request(MTPmessages_GetUnreadMentions(history->peer->input, MTP_int(offsetId), MTP_int(addOffset), MTP_int(limit), MTP_int(maxId), MTP_int(minId))).done([this, history](const MTPmessages_Messages &result) {
 		_unreadMentionsRequests.remove(history);
 		history->addUnreadMentionsSlice(result);
-	}).fail([this, history](const MTP::Error &error) {
+	}).fail([this, history] {
 		_unreadMentionsRequests.remove(history);
 	}).send();
 	_unreadMentionsRequests.emplace(history, requestId);
@@ -2982,7 +2982,7 @@ void ApiWrap::requestSharedMedia(
 			_sharedMediaRequests.remove(key);
 			sharedMediaDone(peer, type, messageId, slice, result);
 			finish();
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_sharedMediaRequests.remove(key);
 			finish();
 		}).send();
@@ -3031,7 +3031,7 @@ void ApiWrap::requestUserPhotos(
 	)).done([this, user, afterId](const MTPphotos_Photos &result) {
 		_userPhotosRequests.remove(user);
 		userPhotosDone(user, afterId, result);
-	}).fail([this, user](const MTP::Error &error) {
+	}).fail([this, user] {
 		_userPhotosRequests.remove(user);
 	}).send();
 	_userPhotosRequests.emplace(user, requestId);
@@ -3823,7 +3823,7 @@ void ApiWrap::uploadAlbumMedia(
 			sendAlbumWithUploaded(item, groupId, media);
 		} break;
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		failed();
 	}).send();
 }
@@ -4034,7 +4034,7 @@ void ApiWrap::reloadContactSignupSilent() {
 		const auto silent = mtpIsTrue(result);
 		_contactSignupSilent = silent;
 		_contactSignupSilentChanges.fire_copy(silent);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_contactSignupSilentRequestId = 0;
 	}).send();
 	_contactSignupSilentRequestId = requestId;
@@ -4060,7 +4060,7 @@ void ApiWrap::saveContactSignupSilent(bool silent) {
 		_contactSignupSilentRequestId = 0;
 		_contactSignupSilent = silent;
 		_contactSignupSilentChanges.fire_copy(silent);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_contactSignupSilentRequestId = 0;
 	}).send();
 	_contactSignupSilentRequestId = requestId;
@@ -4085,7 +4085,7 @@ void ApiWrap::saveSelfBio(const QString &text) {
 
 		_session->data().processUser(result);
 		_session->user()->setAbout(_bio.requestedText);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_bio.requestId = 0;
 	}).send();
 }

Telegram/SourceFiles/boxes/passcode_box.cpp

@@ -478,10 +478,6 @@ void PasscodeBox::closeReplacedBy() {
 	}
 }
 
-void PasscodeBox::setPasswordFail(const MTP::Error &error) {
-	setPasswordFail(error.type());
-}
-
 void PasscodeBox::setPasswordFail(const QString &type) {
 	if (MTP::IsFloodError(type)) {
 		closeReplacedBy();
@@ -533,7 +529,7 @@ void PasscodeBox::setPasswordFail(
 
 		validateEmail(email, codeLength, newPasswordBytes);
 	} else {
-		setPasswordFail(error);
+		setPasswordFail(error.type());
 	}
 }
 
@@ -582,7 +578,7 @@ void PasscodeBox::validateEmail(
 		)).done([=](const MTPBool &result) {
 			_setRequest = 0;
 			resent->fire(tr::lng_cloud_password_resent(tr::now));
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_setRequest = 0;
 			errors->fire(Lang::Hard::ServerError());
 		}).send();
@@ -942,7 +938,7 @@ void PasscodeBox::changeCloudPassword(
 			});
 		}
 	}).fail([=](const MTP::Error &error) {
-		setPasswordFail(error);
+		setPasswordFail(error.type());
 	}).handleFloodErrors().send();
 }
 
@@ -1419,7 +1415,7 @@ RecoveryEmailValidation ConfirmRecoveryEmail(
 		)).done([=](const MTPBool &result) {
 			*requestId = 0;
 			resent->fire(tr::lng_cloud_password_resent(tr::now));
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			*requestId = 0;
 			errors->fire(Lang::Hard::ServerError());
 		}).send();

Telegram/SourceFiles/boxes/passcode_box.h

@@ -98,7 +98,6 @@ private:
 	void recoverPasswordDone(
 		const QByteArray &newPasswordBytes,
 		const MTPauth_Authorization &result);
-	void setPasswordFail(const MTP::Error &error);
 	void setPasswordFail(const QString &type);
 	void setPasswordFail(
 		const QByteArray &newPasswordBytes,

Telegram/SourceFiles/boxes/peers/add_participants_box.cpp

@@ -490,7 +490,7 @@ void AddSpecialBoxController::loadMoreRows() {
 			setDescriptionText(tr::lng_blocked_list_not_found(tr::now));
 		}
 		delegate()->peerListRefreshRows();
-	}).fail([this](const MTP::Error &error) {
+	}).fail([this] {
 		_loadRequestId = 0;
 	}).send();
 }
@@ -530,7 +530,7 @@ bool AddSpecialBoxController::checkInfoLoaded(
 				Api::ChatParticipant(data.vparticipant(), channel));
 		});
 		callback();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_additional.setExternal(participant);
 		callback();
 	}).send();

Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp

@@ -73,7 +73,6 @@ void SendRequest(
 				lt_user,
 				first));
 		}
-	}).fail([=](const MTP::Error &error) {
 	}).send();
 }
 

Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp

@@ -61,7 +61,7 @@ void RemoveAdmin(
 		if (onDone) {
 			onDone();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		if (onFail) {
 			onFail();
 		}
@@ -168,7 +168,7 @@ void SaveChannelRestriction(
 		if (onDone) {
 			onDone();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		if (onFail) {
 			onFail();
 		}
@@ -189,7 +189,7 @@ void SaveChatParticipantKick(
 		if (onDone) {
 			onDone();
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		if (onFail) {
 			onFail();
 		}
@@ -1418,7 +1418,7 @@ void ParticipantsBoxController::loadMoreRows() {
 			_onlineSorter->sort();
 		}
 		delegate()->peerListRefreshRows();
-	}).fail([this](const MTP::Error &error) {
+	}).fail([this] {
 		_loadRequestId = 0;
 	}).send();
 }

Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp

@@ -242,7 +242,7 @@ void ShowEditPermissions(
 		const auto api = &peer->session().api();
 		api->migrateChat(chat, [=](not_null<ChannelData*> channel) {
 			save(channel, result);
-		}, [=](const MTP::Error &error) {
+		}, [=](const MTP::Error &) {
 			*saving = false;
 		});
 	}, box->lifetime());
@@ -685,7 +685,7 @@ void Controller::showEditLinkedChatBox() {
 				std::move(chats),
 				callback),
 			Ui::LayerOption::KeepOther);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_linkedChatsRequestId = 0;
 	}).send();
 }
@@ -1361,7 +1361,7 @@ void Controller::saveLinkedChat() {
 	)).done([=](const MTPBool &result) {
 		channel->setLinkedChat(*_savingData.linkedChat);
 		continueSave();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		cancelSave();
 	}).send();
 }

Telegram/SourceFiles/boxes/peers/edit_peer_invite_link.cpp

@@ -689,7 +689,7 @@ void Controller::loadMoreRows() {
 		auto slice = Api::ParseJoinedByLinkSlice(_peer, result);
 		_allLoaded = slice.users.empty();
 		appendSlice(slice);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 		_allLoaded = true;
 	}).send();

Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp

@@ -327,7 +327,7 @@ Fn<void()> AboutGigagroupCallback(not_null<ChannelData*> channel) {
 			channel->session().api().applyUpdates(result);
 			Ui::hideSettingsAndLayer();
 			Ui::Toast::Show(tr::lng_gigagroup_done(tr::now));
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			*converting = false;
 		}).send();
 	};

Telegram/SourceFiles/boxes/peers/edit_peer_requests_box.cpp

@@ -340,7 +340,7 @@ void RequestsBoxController::loadMoreRows() {
 			refreshDescription();
 		}
 		delegate()->peerListRefreshRows();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_loadRequestId = 0;
 		_allLoaded = true;
 	}).send();

Telegram/SourceFiles/boxes/pin_messages_box.cpp

@@ -123,7 +123,7 @@ void PinMessageBox::pinMessage() {
 	)).done([=](const MTPUpdates &result) {
 		_peer->session().api().applyUpdates(result);
 		Ui::hideLayer();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		Ui::hideLayer();
 	}).send();
 }

Telegram/SourceFiles/boxes/sticker_set_box.cpp

@@ -371,7 +371,7 @@ StickerSetBox::Inner::Inner(
 		MTP_int(0) // hash
 	)).done([=](const MTPmessages_StickerSet &result) {
 		gotSet(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_loaded = true;
 		_errors.fire(Error::NotFound);
 	}).send();
@@ -934,7 +934,7 @@ void StickerSetBox::Inner::install() {
 		MTP_bool(false)
 	)).done([=](const MTPmessages_StickerSetInstallResult &result) {
 		installDone(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_errors.fire(Error::NotFound);
 	}).send();
 }
@@ -947,7 +947,7 @@ void StickerSetBox::Inner::archiveStickers() {
 		if (result.type() == mtpc_messages_stickerSetInstallResultSuccess) {
 			_setArchived.fire_copy(_setId);
 		}
-	}).fail([](const MTP::Error &error) {
+	}).fail([] {
 		Ui::Toast::Show(Lang::Hard::ServerError());
 	}).send();
 }

Telegram/SourceFiles/boxes/stickers_box.cpp

@@ -1897,7 +1897,7 @@ void StickersBox::Inner::handleMegagroupSetAddressChange() {
 			}, [](const MTPDmessages_stickerSetNotModified &) {
 				LOG(("API Error: Unexpected messages.stickerSetNotModified."));
 			});
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_megagroupSetRequestId = 0;
 			setMegagroupSelectedSet({});
 		}).send();

Telegram/SourceFiles/boxes/url_auth_box.cpp

@@ -67,7 +67,7 @@ void UrlAuthBox::Activate(
 				Request(data, item, row, column);
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		const auto button = HistoryMessageMarkupButton::Get(
 			&session->data(),
 			itemId,
@@ -105,7 +105,7 @@ void UrlAuthBox::Activate(
 		}, [&](const MTPDurlAuthResultRequest &data) {
 			Request(data, session, url, context);
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		HiddenUrlClickHandler::Open(url, context);
 	}).send();
 }
@@ -165,7 +165,7 @@ void UrlAuthBox::Request(
 					return url;
 				});
 				finishWithUrl(to);
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				finishWithUrl(url);
 			}).send();
 		}
@@ -216,7 +216,7 @@ void UrlAuthBox::Request(
 					return url;
 				});
 				finishWithUrl(to);
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				finishWithUrl(url);
 			}).send();
 		}

Telegram/SourceFiles/calls/calls_box_controller.cpp

@@ -344,7 +344,7 @@ void BoxController::loadMoreRows() {
 		} break;
 		default: Unexpected("Type of messages.Messages (Calls::BoxController::preloadRows)");
 		}
-	}).fail([this](const MTP::Error &error) {
+	}).fail([this] {
 		_loadRequestId = 0;
 	}).send();
 }

Telegram/SourceFiles/calls/calls_call.cpp

@@ -1209,7 +1209,7 @@ void Call::finish(FinishType type, const MTPPhoneCallDiscardReason &reason) {
 		// updates being handled, but in a guarded way.
 		crl::on_main(weak, [=] { setState(finalState); });
 		session->api().applyUpdates(result);
-	}).fail(crl::guard(weak, [this, finalState](const MTP::Error &error) {
+	}).fail(crl::guard(weak, [this, finalState] {
 		setState(finalState);
 	})).send();
 }

Telegram/SourceFiles/calls/calls_instance.cpp

@@ -332,7 +332,7 @@ void Instance::refreshDhConfig() {
 		} else {
 			_delegate->callFailed(call);
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		const auto call = weak.get();
 		if (!call) {
 			return;
@@ -391,7 +391,7 @@ void Instance::refreshServerConfig(not_null<Main::Session*> session) {
 
 		const auto &json = result.c_dataJSON().vdata().v;
 		UpdateConfig(std::string(json.data(), json.size()));
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_serverConfigRequestSession = nullptr;
 	}).send();
 }

Telegram/SourceFiles/calls/group/calls_choose_join_as.cpp

@@ -467,7 +467,7 @@ void ChooseJoinAsProcess::start(
 
 		_request->box = box.data();
 		_request->showBox(std::move(box));
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		finish({
 			.peer = _request->peer,
 			.joinAs = _request->peer->session().user(),

Telegram/SourceFiles/calls/group/calls_group_call.cpp

@@ -1604,7 +1604,7 @@ void GroupCall::discard() {
 		// updates being handled, but in a guarded way.
 		crl::on_main(this, [=] { hangup(); });
 		_peer->session().api().applyUpdates(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		hangup();
 	}).send();
 }
@@ -1672,7 +1672,7 @@ void GroupCall::leave() {
 		// updates being handled, but in a guarded way.
 		crl::on_main(weak, [=] { setState(finalState); });
 		session->api().applyUpdates(result);
-	}).fail(crl::guard(weak, [=](const MTP::Error &error) {
+	}).fail(crl::guard(weak, [=] {
 		setState(finalState);
 	})).send();
 }
@@ -2225,7 +2225,6 @@ void GroupCall::changeTitle(const QString &title) {
 	)).done([=](const MTPUpdates &result) {
 		_peer->session().api().applyUpdates(result);
 		_titleChanged.fire({});
-	}).fail([=](const MTP::Error &error) {
 	}).send();
 }
 
@@ -2258,7 +2257,7 @@ void GroupCall::toggleRecording(
 	)).done([=](const MTPUpdates &result) {
 		_peer->session().api().applyUpdates(result);
 		_recordingStoppedByMe = false;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_recordingStoppedByMe = false;
 	}).send();
 }

Telegram/SourceFiles/chat_helpers/emoji_keywords.cpp

@@ -400,7 +400,7 @@ void EmojiKeywords::LangPack::refresh() {
 			_requestId = 0;
 			_lastRefreshTime = crl::now();
 			applyDifference(result);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_requestId = 0;
 			_lastRefreshTime = crl::now();
 		}).send();
@@ -670,7 +670,7 @@ void EmojiKeywords::refreshRemoteList() {
 			});
 		}) | ranges::to_vector);
 		_langsRequestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_langsRequestId = 0;
 	}).send();
 }

Telegram/SourceFiles/chat_helpers/gifs_list_widget.cpp

@@ -854,7 +854,7 @@ void GifsListWidget::sendInlineRequest() {
 		MTP_string(nextOffset)
 	)).done([this](const MTPmessages_BotResults &result) {
 		inlineResultsDone(result);
-	}).fail([this](const MTP::Error &error) {
+	}).fail([this] {
 		// show error?
 		_footer->setLoading(false);
 		_inlineRequestId = 0;

Telegram/SourceFiles/chat_helpers/send_context_menu.cpp

@@ -160,7 +160,7 @@ void SetupUnreadMentionsMenu(
 			)).done([=](const MTPmessages_AffectedHistory &result) {
 				state->sentForPeers.remove(peer);
 				peer->session().api().applyAffectedHistory(peer, result);
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				state->sentForPeers.remove(peer);
 			}).send();
 		});

Telegram/SourceFiles/chat_helpers/stickers_dice_pack.cpp

@@ -55,7 +55,7 @@ void DicePack::load() {
 		}, [](const MTPDmessages_stickerSetNotModified &) {
 			LOG(("API Error: Unexpected messages.stickerSetNotModified."));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 	}).send();
 }

Telegram/SourceFiles/chat_helpers/stickers_emoji_pack.cpp

@@ -237,7 +237,7 @@ void EmojiPack::refreshAnimations() {
 		}, [](const MTPDmessages_stickerSetNotModified &) {
 			LOG(("API Error: Unexpected messages.stickerSetNotModified."));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_animationsRequestId = 0;
 		refreshDelayed();
 	}).send();

Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp

@@ -1106,7 +1106,6 @@ void StickersListWidget::preloadMoreOfficial() {
 		});
 		resizeToWidth(width());
 		update();
-	}).fail([=](const MTP::Error &error) {
 	}).send();
 }
 
@@ -1276,7 +1275,7 @@ void StickersListWidget::sendSearchRequest() {
 		MTP_long(hash)
 	)).done([=](const MTPmessages_FoundStickerSets &result) {
 		searchResultsDone(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		// show error?
 		_footer->setLoading(false);
 		_searchRequestId = 0;
@@ -3149,7 +3148,7 @@ void StickersListWidget::sendInstallRequest(
 			session().data().stickers().applyArchivedResult(
 				result.c_messages_stickerSetInstallResultArchive());
 		}
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		notInstalledLocally(setId);
 		session().data().stickers().undoInstallLocally(setId);
 	}).send();

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -256,7 +256,7 @@ void ChatFilters::load(bool force) {
 	)).done([=](const MTPVector<MTPDialogFilter> &result) {
 		received(result.v);
 		_loadRequestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_loadRequestId = 0;
 	}).send();
 }
@@ -555,7 +555,7 @@ bool ChatFilters::loadNextExceptions(bool chatsListLoaded) {
 		_exceptionsLoadRequestId = 0;
 		_owner->session().data().histories().applyPeerDialogs(result);
 		_owner->session().api().requestMoreDialogsIfNeeded();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_exceptionsLoadRequestId = 0;
 		_owner->session().api().requestMoreDialogsIfNeeded();
 	}).send();
@@ -594,7 +594,7 @@ void ChatFilters::requestSuggested() {
 		}) | ranges::to_vector;
 
 		_suggestedUpdated.fire({});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_suggestedRequestId = 0;
 		_suggestedLastReceived = crl::now() + kRefreshSuggestedTimeout / 2;
 

Telegram/SourceFiles/data/data_cloud_themes.cpp

@@ -192,7 +192,7 @@ void CloudThemes::reloadCurrent() {
 		MTP_long(fields.documentId)
 	)).done([=](const MTPTheme &result) {
 		applyUpdate(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_reloadCurrentTimer.callOnce(kReloadTimeout);
 	}).send();
 }
@@ -345,7 +345,7 @@ void CloudThemes::refresh() {
 			_updates.fire({});
 		}, [](const MTPDaccount_themesNotModified &) {
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_refreshRequestId = 0;
 	}).send();
 }
@@ -373,7 +373,7 @@ void CloudThemes::refreshChatThemes() {
 			_chatThemesUpdates.fire({});
 		}, [](const MTPDaccount_themesNotModified &) {
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_chatThemesRequestId = 0;
 	}).send();
 }

Telegram/SourceFiles/data/data_group_call.cpp

@@ -135,7 +135,7 @@ void GroupCall::requestParticipants() {
 				_participantsReloaded.fire({});
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_participantsRequestId = 0;
 		const auto reloaded = processSavedFullCall();
 		setServerParticipantsCount(_participants.size());
@@ -511,7 +511,7 @@ void GroupCall::reload() {
 		}
 		_reloadRequestId = 0;
 		processFullCall(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_reloadRequestId = 0;
 	}).send();
 }
@@ -898,7 +898,7 @@ void GroupCall::requestUnknownParticipants() {
 			_participantsResolved.fire(&ssrcs);
 		}
 		requestUnknownParticipants();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_unknownParticipantPeersRequestId = 0;
 		for (const auto &[ssrc, when] : ssrcs) {
 			_unknownSpokenSsrcs.remove(ssrc);

Telegram/SourceFiles/data/data_histories.cpp

@@ -268,7 +268,7 @@ void Histories::requestDialogEntry(not_null<Data::Folder*> folder) {
 	)).done([=](const MTPmessages_PeerDialogs &result) {
 		applyPeerDialogs(result);
 		_dialogFolderRequests.remove(folder);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_dialogFolderRequests.remove(folder);
 	}).send();
 }
@@ -348,7 +348,7 @@ void Histories::sendDialogRequests() {
 	)).done([=](const MTPmessages_PeerDialogs &result) {
 		applyPeerDialogs(result);
 		finalize();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		finalize();
 	}).send();
 }
@@ -428,7 +428,7 @@ void Histories::requestFakeChatListMessage(
 			_fakeChatListRequests.erase(history);
 			history->setFakeChatListMessageFrom(result);
 			finish();
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_fakeChatListRequests.erase(history);
 			history->setFakeChatListMessageFrom(MTP_messages_messages(
 				MTP_vector<MTPMessage>(0),
@@ -472,7 +472,7 @@ void Histories::requestGroupAround(not_null<HistoryItem*> item) {
 				history->channelId(),
 				result);
 			finish();
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_chatListGroupRequests.remove(history);
 			finish();
 		}).send();
@@ -555,7 +555,7 @@ void Histories::sendReadRequest(not_null<History*> history, State &state) {
 				MTP_int(tillId)
 			)).done([=](const MTPBool &result) {
 				finished();
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				finished();
 			}).send();
 		} else {
@@ -565,7 +565,7 @@ void Histories::sendReadRequest(not_null<History*> history, State &state) {
 			)).done([=](const MTPmessages_AffectedMessages &result) {
 				session().api().applyAffectedMessages(history->peer, result);
 				finished();
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				finished();
 			}).send();
 		}
@@ -610,20 +610,17 @@ void Histories::deleteMessages(
 			finish();
 			history->requestChatListMessage();
 		};
-		const auto fail = [=](const MTP::Error &error) {
-			finish();
-		};
 		if (const auto channel = history->peer->asChannel()) {
 			return session().api().request(MTPchannels_DeleteMessages(
 				channel->inputChannel,
 				MTP_vector<MTPint>(ids)
-			)).done(done).fail(fail).send();
+			)).done(done).fail(finish).send();
 		} else {
 			using Flag = MTPmessages_DeleteMessages::Flag;
 			return session().api().request(MTPmessages_DeleteMessages(
 				MTP_flags(revoke ? Flag::f_revoke : Flag(0)),
 				MTP_vector<MTPint>(ids)
-			)).done(done).fail(fail).send();
+			)).done(done).fail(finish).send();
 		}
 	});
 }
@@ -635,9 +632,6 @@ void Histories::deleteAllMessages(
 		bool revoke) {
 	sendRequest(history, RequestType::Delete, [=](Fn<void()> finish) {
 		const auto peer = history->peer;
-		const auto fail = [=](const MTP::Error &error) {
-			finish();
-		};
 		const auto chat = peer->asChat();
 		const auto channel = peer->asChannel();
 		if (!justClear && revoke && channel && channel->canDelete()) {
@@ -656,7 +650,7 @@ void Histories::deleteAllMessages(
 				MTP_int(deleteTillId)
 			)).done([=](const MTPBool &result) {
 				finish();
-			}).fail(fail).send();
+			}).fail(finish).send();
 		} else if (revoke && chat && chat->amCreator()) {
 			return session().api().request(MTPmessages_DeleteChat(
 				chat->inputChat
@@ -704,7 +698,7 @@ void Histories::deleteAllMessages(
 						revoke);
 				}
 				finish();
-			}).fail(fail).send();
+			}).fail(finish).send();
 		}
 	});
 }
@@ -734,9 +728,6 @@ void Histories::deleteMessagesByDates(
 		bool revoke) {
 	sendRequest(history, RequestType::Delete, [=](Fn<void()> finish) {
 		const auto peer = history->peer;
-		const auto fail = [=](const MTP::Error &error) {
-			finish();
-		};
 		using Flag = MTPmessages_DeleteHistory::Flag;
 		const auto flags = Flag::f_just_clear
 			| Flag::f_min_date
@@ -756,7 +747,7 @@ void Histories::deleteMessagesByDates(
 				deleteMessagesByDates(history, minDate, maxDate, revoke);
 			}
 			finish();
-		}).fail(fail).send();
+		}).fail(finish).send();
 	});
 	history->destroyMessagesByDates(minDate, maxDate);
 }

Telegram/SourceFiles/data/data_replies_list.cpp

@@ -461,7 +461,7 @@ void RepliesList::loadAround(MsgId id) {
 					_skippedBefore = 0;
 				}
 			}
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_beforeId = 0;
 			_loadingAround = std::nullopt;
 			finish();
@@ -509,7 +509,7 @@ void RepliesList::loadBefore() {
 					_fullCount = _list.size();
 				}
 			}
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_beforeId = 0;
 			finish();
 		}).send();
@@ -553,7 +553,7 @@ void RepliesList::loadAfter() {
 					_fullCount = _list.size();
 				}
 			}
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_afterId = 0;
 			finish();
 		}).send();

Telegram/SourceFiles/data/data_scheduled_messages.cpp

@@ -389,7 +389,7 @@ void ScheduledMessages::request(not_null<History*> history) {
 			MTP_long(hash))
 	).done([=](const MTPmessages_Messages &result) {
 		parse(history, result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requests.remove(history);
 	}).send();
 }

Telegram/SourceFiles/data/data_search_controller.cpp

@@ -391,7 +391,7 @@ void SearchController::requestMore(
 				parsed.noSkipRange,
 				parsed.fullCount);
 			finish();
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			finish();
 		}).send();
 	});

Telegram/SourceFiles/data/data_sponsored_messages.cpp

@@ -124,7 +124,7 @@ void SponsoredMessages::request(not_null<History*> history) {
 			channel->inputChannel)
 	).done([=](const MTPmessages_sponsoredMessages &result) {
 		parse(history, result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requests.remove(history);
 	}).send();
 }
@@ -228,7 +228,7 @@ void SponsoredMessages::view(const FullMsgId &fullId) {
 		auto &request = _viewRequests[randomId];
 		request.lastReceived = crl::now();
 		request.requestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_viewRequests.remove(randomId);
 	}).send();
 }

Telegram/SourceFiles/data/stickers/data_stickers.cpp

@@ -539,7 +539,7 @@ void Stickers::requestSetToPushFaved(not_null<DocumentData*> document) {
 		}, [](const MTPDmessages_stickerSetNotModified &) {
 			LOG(("API Error: Unexpected messages.stickerSetNotModified."));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		// Perhaps this is a deleted sticker pack. Add anyway.
 		addAnyway({});
 	}).send();

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp

@@ -767,7 +767,7 @@ void InnerWidget::preloadMore(Direction direction) {
 		if (!loadedFlag) {
 			addEvents(direction, results.vevents().v);
 		}
-	}).fail([this, &requestId, &loadedFlag](const MTP::Error &error) {
+	}).fail([this, &requestId, &loadedFlag] {
 		requestId = 0;
 		loadedFlag = true;
 		update();
@@ -1431,7 +1431,7 @@ void InnerWidget::suggestRestrictParticipant(
 						|| (type == mtpc_channelParticipantCreator);
 					editRestrictions(hasAdminRights, ChatRestrictionsInfo());
 				}
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				editRestrictions(false, ChatRestrictionsInfo());
 			}).send();
 		}

Telegram/SourceFiles/history/history_message.cpp

@@ -321,7 +321,7 @@ void FastShareMessage(not_null<HistoryItem*> item) {
 						Ui::hideLayer();
 					}
 					finish();
-				}).fail([=](const MTP::Error &error) {
+				}).fail([=] {
 					finish();
 				}).afterRequest(history->sendRequestId).send();
 				return history->sendRequestId;

Telegram/SourceFiles/history/view/controls/history_view_ttl_button.cpp

@@ -78,7 +78,7 @@ void AutoDeleteSettingsBox(
 			if (const auto strong = state->weak.data()) {
 				strong->closeBox();
 			}
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			state->savingRequestId = 0;
 		}).send();
 	};

Telegram/SourceFiles/history/view/history_view_context_menu.cpp

@@ -1124,7 +1124,6 @@ void SendReport(
 			MTP_string(comment)
 		)).done([=](const MTPBool &result) {
 			Ui::Toast::Show(tr::lng_report_thanks(tr::now));
-		}).fail([=](const MTP::Error &error) {
 		}).send();
 	} else {
 		auto apiIds = QVector<MTPint>();
@@ -1139,7 +1138,6 @@ void SendReport(
 			MTP_string(comment)
 		)).done([=](const MTPBool &result) {
 			Ui::Toast::Show(tr::lng_report_thanks(tr::now));
-		}).fail([=](const MTP::Error &error) {
 		}).send();
 	}
 }

Telegram/SourceFiles/info/polls/info_polls_results_inner_widget.cpp

@@ -298,7 +298,7 @@ void ListController::loadMoreRows() {
 			delegate()->peerListRefreshRows();
 		}
 		_loadRequestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_loadRequestId = 0;
 	}).send();
 }

Telegram/SourceFiles/inline_bots/inline_results_widget.cpp

@@ -447,7 +447,7 @@ void Widget::onInlineRequest() {
 		MTP_string(nextOffset)
 	)).done([=](const MTPmessages_BotResults &result) {
 		inlineResultsDone(result);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		// show error?
 		_requesting.fire(false);
 		_inlineRequestId = 0;

Telegram/SourceFiles/intro/intro_step.cpp

@@ -166,7 +166,7 @@ void Step::finish(const MTPUser &user, QImage &&photo) {
 	api().request(MTPmessages_GetDialogFilters(
 	)).done([=](const MTPVector<MTPDialogFilter> &result) {
 		createSession(user, photo, result.v);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		createSession(user, photo, QVector<MTPDialogFilter>());
 	}).send();
 }

Telegram/SourceFiles/lang/lang_cloud_manager.cpp

@@ -234,7 +234,7 @@ void CloudManager::requestLangPackDifference(Pack pack) {
 		)).done([=](const MTPLangPackDifference &result) {
 			packRequestId(pack) = 0;
 			applyLangPackDifference(result);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			packRequestId(pack) = 0;
 		}).send();
 	} else {
@@ -244,7 +244,7 @@ void CloudManager::requestLangPackDifference(Pack pack) {
 		)).done([=](const MTPLangPackDifference &result) {
 			packRequestId(pack) = 0;
 			applyLangPackDifference(result);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			packRequestId(pack) = 0;
 		}).send();
 	}
@@ -322,7 +322,7 @@ void CloudManager::requestLanguageList() {
 			_languageListChanged.fire({});
 		}
 		_languagesRequestId = 0;
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_languagesRequestId = 0;
 	}).send();
 }
@@ -509,7 +509,7 @@ void CloudManager::switchToLanguage(const Language &data) {
 					tr::lng_cancel(tr::now),
 					[=] { performSwitchAndRestart(data); }),
 				Ui::LayerOption::KeepOther);
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			_getKeysForSwitchRequestId = 0;
 		}).send();
 	}

Telegram/SourceFiles/main/main_app_config.cpp

@@ -51,7 +51,7 @@ void AppConfig::refresh() {
 			DEBUG_LOG(("getAppConfig result handled."));
 		}
 		_refreshed.fire({});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_requestId = 0;
 		refreshDelayed();
 	}).send();

Telegram/SourceFiles/passport/passport_form_controller.cpp

@@ -1038,7 +1038,7 @@ void FormController::cancelPassword() {
 	)).done([=](const MTPBool &result) {
 		_passwordRequestId = 0;
 		reloadPassword();
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		_passwordRequestId = 0;
 		reloadPassword();
 	}).send();
@@ -1259,7 +1259,7 @@ rpl::producer<EditDocumentCountry> FormController::preferredLanguage(
 			});
 			consumer.put_next({ countryCode, findLang() });
 			consumer.put_done();
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			consumer.put_next({ countryCode, QString() });
 			consumer.put_done();
 		}).send();

Telegram/SourceFiles/settings/settings_main.cpp

@@ -329,7 +329,7 @@ void SetupHelp(
 						Ui::showPeerHistory(user, ShowAtUnreadMsgId);
 					}
 				});
-			}).fail([=](const MTP::Error &error) {
+			}).fail([=] {
 				*requestId = 0;
 			}).send();
 		});

Telegram/SourceFiles/support/support_helper.cpp

@@ -263,7 +263,7 @@ Helper::Helper(not_null<Main::Session*> session)
 		result.match([&](const MTPDhelp_supportName &data) {
 			setSupportName(qs(data.vname()));
 		});
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		setSupportName(
 			qsl("[rand^")
 			+ QString::number(Core::Sandbox::Instance().installationTag())
@@ -529,7 +529,7 @@ void Helper::saveInfo(
 	)).done([=](const MTPhelp_UserInfo &result) {
 		applyInfo(user, result);
 		done(true);
-	}).fail([=](const MTP::Error &error) {
+	}).fail([=] {
 		done(false);
 	}).send();
 }

Telegram/SourceFiles/window/themes/window_theme_editor_box.cpp

@@ -743,7 +743,7 @@ void SaveTheme(
 			result.match([&](const MTPDtheme &data) {
 				save(CloudTheme::Parse(&window->account().session(), data));
 			});
-		}).fail([=](const MTP::Error &error) {
+		}).fail([=] {
 			save(CloudTheme());
 		}).send();
 	} else {

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -240,9 +240,7 @@ void SessionNavigation::resolveChannelById(
 				fail();
 			}
 		});
-	}).fail([=](const MTP::Error &error) {
-		fail();
-	}).send();
+	}).fail(fail).send();
 }
 
 void SessionNavigation::showPeerByLinkResolved(
@@ -301,9 +299,7 @@ void SessionNavigation::showPeerByLinkResolved(
 				} else {
 					bad();
 				}
-			}).fail([=](const MTP::Error &error) {
-				bad();
-			}).send();
+			}).fail(bad).send();
 		}).send();
 		return;
 	}