classes.tuple: make error slots read only for small space savings
classes.tuple: make error slots read only for small space savings

ceninan/factor,mcandre/factor,littledan/Factor,erg/factor,mcandre/factor,ceninan/factor,erg/factor,kingcons/factor,cataska/factor,kingcons/factor,erg/factor,ceninan/factor,mcandre/factor,erg/factor,kingcons/factor,cataska/factor,kingcons/factor,erg/factor,littledan/Factor,littledan/Factor,mcandre/factor,mcandre/factor,littledan/Factor,cataska/factor,mcandre/factor,erg/factor,erg/factor,mcandre/factor,ceninan/factor,cataska/factor