Internal error: ensure-const-value: Not a const value: #:trace?

[soegaard]

~/racket-april-2014/racket/racket/share/pkgs/whalesong/whalesong/whalesong.rkt build new-racket-cas-whalesong.rkt
Writing program #path:/Users/soegaard/Downloads/racket-cas-whalesong/new-racket-cas-whalesong.js
Writing program #path:/Users/soegaard/Downloads/racket-cas-whalesong/new-racket-cas-whalesong_1.js

(warning whalesong: WARNING: Primitive Kernel Value raise-arity-error has not been implemented

#f whalesong)
ERROR: Whalesong has encountered an internal error.

Please send the following error report log to dyoo@hashcollision.org.

---

ensure-const-value: Not a const value: #:trace?

context...:
extract-static-knowledge
loop
compile-open-codeable-application
compile
compile
loop
compile-open-codeable-application
compile
compile
compile-lambda-body
compile-lambda-bodies
compile-lambda-bodies
compile-lambda-bodies
compile-lambda-bodies
compile-lambda-bodies
compile-lambda-bodies...

---

Aborting compilation.