Browser hangs up when escaped brackets are echoed

[paulsmirnov]

Expected behavior

I expect to be able to output any text to the terminal. I understand that I might need to escape some special characters used for formatting, e.g. square brackets (is any helper method available?). In case I escape them, everything should work fine.

Actual behavior

When I echo a text containing escaped brackets (e.g. 'a\\[i\\]=42'), browser hangs up. Note that I have to escape them at least inside color formatting syntax ([[b;white;red]text]).

Steps to reproduce

See this code pen: https://codepen.io/paulsmirnov/pen/ZPYavo
Uncomment the tagged line to experience the issue.

P.S. Note that you don't need to use formatting syntax to hang up, simple echo is enough: term.echo(msg);. I've just decided to show you a motivation behind escaping.

Browser and OS

• Windows 10
• Google Chrome 72.0.3626.119 (Official Build) (64-bit)

[jcubic]

Thanks for the report. This is very bad even this don't work:

term.echo('Display [[b;white;red]' + $.terminal.escape_brackets('a[i]=42') + '] and hang up!');

It don't hang locally when I tested but the output is totally broken also nested formatting give weird output and make this even worse.

[jcubic]

The problem was that unix formatter (from_ansi) was meta formatter (it had __meta__ == true marker) so it processed whole command not only between formatting like normal formatter.

This is changing how unix formatting works but I think it's fine. I don't think that it will break someones code and if it do he can add back __meta__ marker.