gistfile1.txt

$ cat ex-test.clj                
(ns ex-test
  (:require [io.aviso.repl :refer [install-pretty-exceptions]]))

(install-pretty-exceptions)
(+ 1 2 3 nil)

$ /usr/bin/clojure --report stderr ex-test.clj
Picked up JAVA_TOOL_OPTIONS: --add-modules=java.xml.bind
{:clojure.main/message
 "Syntax error (NullPointerException) compiling at (ex-test.clj:5:1).\nnull\n",
 :clojure.main/triage
 {:clojure.error/phase :compile-syntax-check,
  :clojure.error/line 5,
  :clojure.error/column 1,
  :clojure.error/source "ex-test.clj",
  :clojure.error/path "ex-test.clj",
  :clojure.error/class java.lang.NullPointerException},
 :clojure.main/trace
 {:via
  [{:type clojure.lang.Compiler$CompilerException,
    :message
    "Syntax error compiling at (/home/ben/devel/advent/2019/ex-test.clj:5:1).",
    :data
    {:clojure.error/phase :compile-syntax-check,
     :clojure.error/line 5,
     :clojure.error/column 1,
     :clojure.error/source "/home/ben/devel/advent/2019/ex-test.clj"},
    :at [clojure.lang.Compiler load "Compiler.java" 7648]}
   {:type java.lang.NullPointerException,
    :at [clojure.lang.Numbers ops "Numbers.java" 1068]}],
  :trace
  [[clojure.lang.Numbers ops "Numbers.java" 1068]
   [clojure.lang.Numbers add "Numbers.java" 153]
   [clojure.lang.Numbers add "Numbers.java" 3733]
   [ex_test$eval752 invokeStatic "ex-test.clj" 5]
   [ex_test$eval752 invoke "ex-test.clj" 5]
   [clojure.lang.Compiler eval "Compiler.java" 7177]
   [clojure.lang.Compiler load "Compiler.java" 7636]
   [clojure.lang.Compiler loadFile "Compiler.java" 7574]
   [clojure.main$load_script invokeStatic "main.clj" 475]
   [clojure.main$script_opt invokeStatic "main.clj" 535]
   [clojure.main$script_opt invoke "main.clj" 530]
   [clojure.main$main invokeStatic "main.clj" 664]
   [clojure.main$main doInvoke "main.clj" 616]
   [clojure.lang.RestFn applyTo "RestFn.java" 137]
   [clojure.lang.Var applyTo "Var.java" 705]
   [clojure.main main "main.java" 40]],
  :phase :compile-syntax-check}}

Syntax error (NullPointerException) compiling at (ex-test.clj:5:1).
null