In late January, John Stabb, best known as the vocalist of ’80s D.C. hardcore band Government Issue, thought he had appendicitis. It turns out Stabb, who added sarcastic lyrics to GI’s psychedelia-tinged roar, has malignant stomach cancer. With his immune system compromised following surgery and chemotherapy, Stabb’s spent most of his days since diagnosis in the hospital. To help raise funds for his medical and living expenses, friends and colleagues have put together a three-act gig, “Boycott Cancer: A Benefit for John Stabb.” Headliner Thurston Moore, best known as a guitarist for post-punk band Sonic Youth, has been a fan of D.C. hardcore since the early ’80s, as he made enthusiastically clear in the documentary Salad Days. J. Robbins played bass for Government Issue in the late ’80s and has since performed and sung with post-punk outfits like Jawbox and Burning Airlines, in addition to working as a producer. Opening act Give, a young D.C. hardcore ensemble, adds a metallic tint to its frenetic sound. Stabb has long been known for his humor, so despite the seriousness of his situation, look for the bands and promises of surprise guests to be true to John’s fighting spirit. Thurston Moore, J. Robbins, and Give perform at 7:30 p.m. at The Black Cat Backstage, 1811 14th St. NW. $15. (202) 667-4490. blackcatdc.com.