# Test Case: Linux ACL order and empty header

**Test ID**: TC138-acl-linux-order-and-empty-header
**Fixture**: `basic.erofs`

## Objective

Accept Linux ACL tag phases without sorting named IDs, treat a version-only
header as mode fallback, and reject duplicate IDs, bad phase, and bad perms.
The manifest must record rebuilt xattr bodies and `i_xattr_icount` fields.

## Manual steps

```sh
getfacl -n /mnt/repo22-g4/acl-unordered
getfacl -n /mnt/repo22-g4/acl-header
truss -o /tmp/tc138-duplicate.truss getfacl -n \
  /mnt/repo22-g4/acl-duplicate
truss -o /tmp/tc138-phase.truss getfacl -n /mnt/repo22-g4/acl-phase
truss -o /tmp/tc138-perm.truss getfacl -n /mnt/repo22-g4/acl-perm
grep __acl_get_file /tmp/tc138-*.truss
```

## Expected results

The first ACL lists user 3002 before 2002. Header-only output is mode-derived
`rw-/r--/r--`. All three malformed ACLs return `EINTEGRITY` (97). Clean up.
