A few months ago, the police shut down a Cro-Mags show before the hardcore legends even hit the stage. A stabbing kerfuffle had erupted backstage between the band’s current bassist and one of its former four-stringers. Even after two decades since the heyday of L.E.S. hardcore matinees, anything can happen. Regardless, the current lineup of the group, featuring John Joseph on vocals, has never sounded better. And with the addition of openers Sheer Terror and a bevy of like-minded bruisers (Rude Awakening, Brain Slug, Born Annoying) who go on early, some of that old energy may surface again tonight in a positive way.

Sun., Dec. 30, 5:30 p.m., 2012