Robin Roberts was the target of a man who threatened to punch her in the face for not paying a debt ... and now he's behind bars.
43-year-old Troy Warren was arrested Monday after showing up at the GMA studio eight times between June 10 and June 24. A security officer told NYPD ... Warren threatened to punch Robin in the face because she owed him money.
Warren has been charged with misdemeanor stalking and harassment.
A homeless man with a knife showed up to the same Times Square studio on July 1 and threatened Michael Strahan. He was subdued by security before getting near Strahan.