| ⇢ | A | TaskErrorHandlerTrait added | |
| B | ↘ | C | Manager got worse |
| ⇢ | A | TaskErrorHandlerTrait::installErrorHandler() added | |
| ⇢ | A | TaskErrorHandlerTrait::restoreErrorHandler() added | |
| ⇢ | A | TaskErrorHandlerTrait::customErrorHandler() added | |
| A | ↛ | Manager::__destruct() removed | |
| A | ↛ | Manager::customErrorHandler() removed |