;; Error during read
user=> :::5
Syntax error reading source at (2:0). Cause: Invalid token: :::5

;; Macroexpand spec error
user=> (let [x])
Syntax error macroexpanding clojure.core/let at (2:1). Cause: Call to clojure.core/let did not conform to spec.
[x] - failed: even-number-of-forms? at: [:bindings] spec: :clojure.core.specs.alpha/bindings

;; Macroexpand intentional check error
user=> (cond 1)
Syntax error macroexpanding cond at (3:1).
Cause: cond requires an even number of forms

;; Macroexpand unexpected error
user=> (defmulti 5 class)
Unexpected error macroexpanding defmulti at (4:1).
Cause: ClassCastException java.lang.Long cannot be cast to clojure.lang.IObj

;; Compile error
user=> (def 5)
Syntax error compiling def at (5:1).
Cause: First argument to def must be a Symbol

;; Evaluation error
user=> (/ 1 0)
Evaluation error at clojure.lang.Numbers.divide (Numbers.java:163). ArithmeticException Divide by zero

;; Spec function invocation error
user=> (require '[clojure.spec.alpha :as s] '[clojure.spec.test.alpha :as stest])
nil
user=> (defn f [a] a)
#'user/f
user=> (s/fdef f :args (s/cat :a int?))
user/f
user=> (stest/instrument `f)
[user/f]
user=> (f "oops")
Evaluation error at clojure.spec.test.alpha/spec-checking-fn/conform!--3024 (alpha.clj:132). ExceptionInfo Call to #'user/f did not conform to spec.
"oops" - failed: int? at: [:a]

;; Assertion failure
user=> (assert false)
Evaluation error at user/eval145 (NO_SOURCE_FILE:12). AssertionError Assert failed: false

;; Print error in repl
user=> (deftype T [a])
user.T
user=> (defmethod print-method T [_ w] (throw (Exception. "boom")))
#object[clojure.lang.MultiFn 0x5ed828d "clojure.lang.MultiFn@5ed828d"]
user=> (->T 1)
Error printing return value at user/eval152/fn--153 (NO_SOURCE_FILE:14). Exception boom