From the NannyMUD documentation

LAST CHANGE

2001-08-07

FUNCTION

NAME
        catch - Catch all errors.


SYNTAX
	mixed catch(expr)

DESCRIPTION
	Evaluate 'expr'. If there is no error, 0 is returned. If there is a
	standard error, a string (with a leading '*') will be returned. The
	string contains the full backtrace.

	The function throw(value) can also be used to immediately return any
	value, except 0.
NOTE
	Don't use catch() to hide errors, use it to preserve consistency.




SEE ALSO
        throw in efun/debug/throw