Using a binary shift left ("<<") followed by a left parenthesis causes Perl syntax highlighting to fail.

David Stults il y a 9 ans mis à jour par Fredrik Ehnbom il y a 9 ans 1

$x = 1 << (32 - $y);

Everything after the ; will be colored yellow, no more syntax highlighting.
Sounds like it might be this bug: https://github.com/textmate/perl.tmbundle/issues/3