A longstanding superstition holds that saying the title of William Shakespeare’s “Macbeth” while inside a theater — unless you are rehearsing or performing the play itself — will bring about a terrible curse.

The notion is based on an unfounded legend, but it makes you wonder what people were saying in the studio where “Rent: Live” was rehearsing the past few weeks. On Sunday, not long before the 8 p.m. curtain for the musical’s live broadcast on Fox, the network announced that Brennin Hunt, the actor playing Roger, seriously injured his foot while performing during the previous day’s dress rehearsal. Unlike on Broadway (and in most professional theater productions), the show did not have understudies for its leads.

The solution? Much of what viewers would see would be Saturday’s recorded performance, the cast noted in a statement during an early commercial break. The final 15 minutes or so were live; Hunt was at a table, his foot in a cast and propped on a chair. (Hashtags like #RentNotLive and #RentKindaLive trended during the broadcast.)