bound in a repl thread to the most recent exception caught by the repl
user=> (ns-refers) ;;Oops! we missed a namespace (ns-refers 'user) ; Evaluation aborted. user=> *e #<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core/ns-refers>
Prints a stack trace of the exception, to the depth requested. If none supplied, uses the root cause...
*e
