| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 4 of 7 | 43% | 0 of 0 | n/a | 3 | 4 | 3 | 4 | 3 | 4 |
| getCachedValue(StructLayout.Member) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| putCachedValue(StructLayout.Member, IRubyObject) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| putReference(StructLayout.Member, Object) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| StructLayout.NullStorage() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |