Currently if you try to go to /batch?id=123 you get redirected to the homepage with a message stating "No active batch". This seems counter productive, since the batch doesn't exist Drupal should just emit a 404 instead. Attached is a patch for 7.x, I can roll for 8.x too.
| Attachment | Size | Status | Test result | Operations |
|---|---|---|---|---|
| no_valid_batch-404.patch | 379 bytes | Idle | PASSED: [[SimpleTest]]: [MySQL] 40,339 pass(es). | View details | Re-test |