ptext (sLit "update_frame: ") <>
maybe (ptext (sLit "<none>")) pprUpdateFrame update_frame,
ptext (sLit "type: ") <> pprLit closure_type,
ptext (sLit "update_frame: ") <>
maybe (ptext (sLit "<none>")) pprUpdateFrame update_frame,
ptext (sLit "type: ") <> pprLit closure_type,