Pasting specific text in multi-line quote causing that specific room to crash

[josephmarksjr]

Rocket.Chat Version: v54
Running Instances: 1
DB Replicaset OpLog: Enabled
Runtime_Environment
Node Version: v4.5.0
Build_Environment
Node version: v4.7.3

I noticed an odd bug that can cripple any private or group chat. I copied and pasted a message someone sent, in order to sent it to someone else. I also wrapped it in ``` to form a multi-level quote.

Reproduce this by pasting the following test and wrapping it with ```:
I ....

When you send this, the chat page hangs and eventually you can't do anything. In Chrome it will eventually ask you to kill the page.

When you come back to RC (you'll have to manually go to a different url, such as a different dm or chat) and go back to the previous chat, it won't load or it won't let you send messages.

I was also able to reproduce this at http://demo.rocket.chat.

[geekgonecrazy]

Confirmed this for sure brings down the browser.

```I .... ```

And it immediately locks up the entire window.

Also renders that channel completely useless until its removed directly from the db

[geekgonecrazy]

Can reproduce with as little as ```U ..``` a single dot is no issue. 2 or more breaks it

[geekgonecrazy]

Traced it down to: https://github.com/RocketChat/Rocket.Chat/blob/develop/packages/rocketchat-markdown/markdowncode.js#L81
If you feed it: I .. doing something like: hljs.highlightAuto(('I ..')) everything locks up

[geekgonecrazy]

Created an issue: highlightjs/highlight.js#1505

[geekgonecrazy]

Its been patched upstream: highlightjs/highlight.js@d05317a

Just need to wait on a release or reference the commit. 👍