suggestion for checking unicode characters against "trojan source attacks"

[Jérémy Lal <kapouer@melix.org>]

Hi,

the topic is about CVE-2021-42574 and CVE-2021-42694.

Some unicode control characters, bidirectional characters, are dangerous

in source code files because they can allow one to reorder source code tokens.

I wonder if lintian is already doing that kind of check, and if not, it seems to be

a good idea for lintian to check the presence of those nasty characters.

Jérémy