From d44f70ad48a5997fe2ebdf941a5e3c8a52b5a1cb Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 7 Jul 2026 22:40:21 +0400
Subject: [PATCH] Guard empty replies when loading usernames

---
 Telegram/SourceFiles/api/api_user_names.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Telegram/SourceFiles/api/api_user_names.cpp b/Telegram/SourceFiles/api/api_user_names.cpp
index d697de749d..187fc0b4db 100644
--- a/Telegram/SourceFiles/api/api_user_names.cpp
+++ b/Telegram/SourceFiles/api/api_user_names.cpp
@@ -71,6 +71,11 @@ rpl::producer<Data::Usernames> Usernames::loadUsernames(
 			_session->api().request(MTPusers_GetUsers(
 				MTP_vector<MTPInputUser>(1, data)
 			)).done([=](const MTPVector<MTPUser> &result) {
+				if (result.v.isEmpty()) {
+					consumer.put_next({});
+					consumer.put_done();
+					return;
+				}
 				result.v.front().match([&](const MTPDuser &data) {
 					push(data.vusernames(), data.vusername());
 					consumer.put_done();
@@ -85,6 +90,11 @@ rpl::producer<Data::Usernames> Usernames::loadUsernames(
 				MTP_vector<MTPInputChannel>(1, data)
 			)).done([=](const MTPmessages_Chats &result) {
 				result.match([&](const auto &data) {
+					if (data.vchats().v.isEmpty()) {
+						consumer.put_next({});
+						consumer.put_done();
+						return;
+					}
 					data.vchats().v.front().match([&](const MTPDchannel &c) {
 						push(c.vusernames(), c.vusername());
 						consumer.put_done();