Package: src:telegram-desktop Version: 1.3.10-1 Severity: serious Tags: sid buster
the package ftbfs at least on armel, and mips* in Debian, it fails on Ubuntu almost everywhere due to more memory limited buildds. https://launchpad.net/ubuntu/+source/telegram-desktop/1.3.10-1 Did you make any measurements how much better the code is with -flto? I'm unsure if it's worth the trouble for a desktop application.
