store/[org.clojure/clojure "1.8.0"] clj::clojure.core/*e

Official Documentation

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Docstring
==================================================
  bound in a repl thread to the most recent exception caught by the repl

Source

(def ^:dynamic
 ^{:doc "bound in a repl thread to the most recent exception caught by the repl"
   :added "1.0"}
 *e)

Example 1

Edit
(ns-refers) ;; Oops! we missed a namespace (ns-refers 'user)
;; => #<CompilerException java.lang.IllegalArgumentException: Wrong number of args passed to: core$ns-refers (NO_SOURCE_FILE:0)>

*e
;; => #<CompilerException java.lang.IllegalArgumentException: Wrong number of args passed to: core$ns-refers (NO_SOURCE_FILE:0)>

Uses on crossclj