chickadee » condition-utils » make-exn-condition+

(make-exn-condition+ LOC MSG ARGS [CHN] [COND...]) => property-conditionprocedure

Returns a composite-condition exn COND....

When one-of LOC, MSG, or ARGS is without a useful value in the error context use #f as the actual argument. The optional CHN argument is detected by structure.

When MSG is #f the value "unknown" is used.