| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 79 of 661 | 88% | 18 of 32 | 44% | 16 | 22 | 16 | 140 | 2 | 6 |
| initialize(IRubyObject[], Block) | | 66% | | 44% | 14 | 17 | 12 | 40 | 0 | 1 |
| RubySystemCallError(Ruby, RubyClass, String, int) | | 0% | n/a | 1 | 1 | 4 | 4 | 1 | 1 | |
| errno() | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | ||
| static {...} | | 100% | n/a | 0 | 1 | 0 | 89 | 0 | 1 | |
| createSystemCallErrorClass(Ruby, RubyClass) | | 100% | n/a | 0 | 1 | 0 | 4 | 0 | 1 | |
| RubySystemCallError(Ruby, RubyClass) | | 100% | n/a | 0 | 1 | 0 | 3 | 0 | 1 |