RubyEnumerator.ThreadedNexter.new BlockCallback() {...}

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	12 of 46	74%	2 of 4	50%	2	4	0	8	0	2
call(ThreadContext, IRubyObject[], Block)		70%		50%	2	3	0	7	0	1
{...}		100%		n/a	0	1	0	1	0	1