Avoid console message on empty compile output.
Avoid console message on empty compile output.

Also, refactor some parsing code to avoid assuming the same number
of groups in all the regex patterns.  This was confusing me.

google/codeworld,alphalambda/codeworld,pranjaltale16/codeworld,pranjaltale16/codeworld,google/codeworld,alphalambda/codeworld,google/codeworld,alphalambda/codeworld,pranjaltale16/codeworld