- (make-exn-condition+ LOC MSG ARGS [CALL-CHAIN] [CONDITION-SPEC...]) --> property-conditionprocedure
Returns a composite-condition exn CONDITION-SPEC....
When one-of LOC, MSG, or ARGS is without a useful value in the error context use #f as the actual argument. The optional CALL-CHAIN argument is detected by structure.
When MSG is #f the value "unknown" is used.