gistfile1.txt

(defun blah () (interactive)
 (save-excursion 
       (setq part1  (thing-at-point 'sexp))
       (forward-thing 'sexp)
       (forward-thing 'sexp)
       (setq part2  (thing-at-point 'sexp))

       (setq part3 (concat "(def " part1 " " part2 ")"))

       (slime-eval `(swank:eval-and-grab-output 
                   (str "(def " ,part1 " " ,part2 ")")))))


No message.
  [Thrown class java.lang.NullPointerException]

Restarts:
 0: [QUIT] Quit to the SLIME top level

Backtrace:
  0: clojure.lang.Compiler$FnMethod.parse(Compiler.java:4290)
  1: clojure.lang.Compiler$FnExpr.parse(Compiler.java:3173)
  2: clojure.lang.Compiler.analyzeSeq(Compiler.java:5367)
  3: clojure.lang.Compiler.analyze(Compiler.java:5190)
  4: clojure.lang.Compiler.analyze(Compiler.java:5151)
  5: clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3057)
  6: clojure.lang.Compiler.analyzeSeq(Compiler.java:5371)
  7: clojure.lang.Compiler.analyze(Compiler.java:5190)
  8: clojure.lang.Compiler.analyze(Compiler.java:5151)
  9: clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3057)
 10: clojure.lang.Compiler.analyzeSeq(Compiler.java:5371)
 11: clojure.lang.Compiler.analyze(Compiler.java:5190)
 12: clojure.lang.Compiler.analyze(Compiler.java:5151)
 13: clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:4670)
 14: clojure.lang.Compiler$FnMethod.parse(Compiler.java:4328)
 15: clojure.lang.Compiler$FnExpr.parse(Compiler.java:3173)
 16: clojure.lang.Compiler.analyzeSeq(Compiler.java:5367)
 17: clojure.lang.Compiler.analyze(Compiler.java:5190)
 18: clojure.lang.Compiler.eval(Compiler.java:5421)
 19: clojure.lang.Compiler.eval(Compiler.java:5391)