[plt-dev] crash and burn

[Dave Herman]

;; Definitions window:

(module foo scheme/base
   (define (even? n)
     (or (zero? n) (odd? (sub1 n))))
   (define (odd? n)
     (and (not (zero? n)) (even? (sub1 n)))))

;; Interactions window:

 > (namespace-undefine-variable! 'even?)
 > (namespace-variable-value 'even?)
namespace-variable-value: even? is not defined
 > (odd? 42)

**SEGFAULT**