spec test index / oilshell.org
| case | dash | bash | mksh | osh | description |
| 0 | pass | pass | pass | pass | Locals don't leak |
| 1 | pass | pass | pass | pass | Globals leak |
| 2 | pass | pass | pass | pass | Return statement |
| 3 | pass | pass | pass | pass | Dynamic Scope |
| 4 | pass | pass | pass | pass | Dynamic Scope Mutation (wow this is bad) |
| 5 | pass | pass | pass | pass | Assign local separately |
| 6 | pass | pass | pass | pass | Assign a local and global on same line |
28 passed, 0 ok, 0 known unimplemented, 0 known bugs, 0 failed, 0 skipped