Add failing unit test for regexp
Add failing unit test for regexp

mrjbq7/factor,sarvex/factor-lang,erg/factor,mcandre/factor,factor/factor,ceninan/factor,nicolas-p/factor,bpollack/factor,ceninan/factor,bjourne/factor,mcandre/factor,sarvex/factor-lang,AlexIljin/factor,bpollack/factor,sarvex/factor-lang,jwmerrill/factor,kingcons/factor,littledan/Factor,nicolas-p/factor,seckar/factor,AlexIljin/factor,kingcons/factor,Keyholder/factor,erg/factor,sarvex/factor-lang,tgunr/factor,dch/factor,dch/factor,mcandre/factor,cataska/factor,littledan/Factor,Keyholder/factor,slavapestov/factor,mcandre/factor,ehird/factor,slavapestov/factor,mcandre/factor,nicolas-p/factor,ceninan/factor,slavapestov/factor,tgunr/factor,jwmerrill/factor,ceninan/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,slavapestov/factor,erg/factor,bjourne/factor,kingcons/factor,ehird/factor,dch/factor,cataska/factor,nicolas-p/factor,factor/factor,bjourne/factor,AlexIljin/factor,bjourne/factor,slavapestov/factor,AlexIljin/factor,erg/factor,erg/factor,mrjbq7/factor,dch/factor,mrjbq7/factor,sarvex/factor-lang,bjourne/factor,factor/factor,erg/factor,factor/factor,cataska/factor,nicolas-p/factor,seckar/factor,tgunr/factor,bpollack/factor,tgunr/factor,nicolas-p/factor,factor/factor,bjourne/factor,sarvex/factor-lang,AlexIljin/factor,AlexIljin/factor,cataska/factor,nicolas-p/factor,dch/factor,slavapestov/factor,bpollack/factor,erg/factor,mrjbq7/factor,factor/factor,littledan/Factor,jwmerrill/factor,Keyholder/factor,mcandre/factor,kingcons/factor,tgunr/factor,littledan/Factor,mrjbq7/factor,dch/factor,seckar/factor,tgunr/factor,bpollack/factor,sarvex/factor-lang,mrjbq7/factor,ehird/factor,mcandre/factor,slavapestov/factor,bpollack/factor