### Printing Errors: `errors`

Field | Mutable | Type | Explanation
--- | --- | --- | ---
`debug` | yes | `Bool` | Whether error exceptions contain debug information.
`'thread'` | yes | `Int` | Number of tasks on the thread to be printed.
`width` | yes | `Int` | Maximal width used for printing values in error messages.
`depth` | yes | `Int` | Maximal depth used for printing values in error messages.
`toplevel` | yes | `Procedure` | Nullary procedure invoked after a message has been printed out about an uncaught exception raised on top level.
`subordinate` | yes | `Procedure` | Nullary procedure invoked after a message has been printed out about an uncaught exception raised within a computation space.