Just updated to the latest version of sublime text 3 and found that an issue I had with an old version is still there but slightly different.
The following function signature is valid C:
Glib::ustring Node::_getDragTip(GdkEventMotion */*event*/);
Sublime text shows the star-slash-star and the start-slash with a red background.
Adding a space between the first star and the first slash makes it highlight as expected with the comment in grey and no red backgrounds:
Glib::ustring Node::_getDragTip(GdkEventMotion * /*event*/);
I’d gladly add a space and be done with it, but this isn’t my code, not sure what upstream would think of such a change. 