If I try to open a link in the chat, it crashes my minecraft

How were you able to get the links to work.

Please attach the crash report.

Please attach the complete output of the "Game Output" which can be found on the fourth tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

That's the launcher log.

Need the tab that says "Game Output (PlayerName)", or grab the latest log file that had the link bug happen.

Invalid unless you can reproduce this with an unmodded client. In that case please attach the game output (not launcher log).