How to fix the really really round telegram bubbles and << >> -- stuff

fix_telegram.md

Here is a GDB script to fix it (tested on GNU/Linux only):

 tbreak _ZN3App9initMediaEv
 commands
     set {char}_ZN3App9msgRadiusEv=0xB8
     set {int}(_ZN3App9msgRadiusEv+1)=3
     set {char}(_ZN3App9msgRadiusEv+5)=0xC3
     set {char}_Z25replaceStringWithEntitiesRK13QLatin1String5QCharR7QStringP5QListI12EntityInTextEb = 0xC3
 end
 run
 detach
 quit

Run it like this, assuming it is saved to msgRadius.gdb and Telegram is /usr/bin/telegram-desktop:

$ gdb -x msgRadius.gdb /usr/bin/telegram-desktop

This replaces the start of App::msgRadius with

mov $0x3, %eax
retq

In C++, that is return 3;

Explanation: 0xB8 means mov a number to %eax, 3 is the border radius, and 0xC3 is retq. The first instruction in replaceStringWithEntities gets replacemed by a retq, bypassing it.

I'd like to note that this is forked (uncredited) from something I made: telegramdesktop/tdesktop#2235 (comment)