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.