execute_js("document.write('foo')") on a Harmony::Page instance raises error

[bsiggelkow]

I am getting this error when I run this code http://gist.github.com/581742:

ruby-1.8.7-p299 > p.execute_js("document.write('foo');")
Johnson::Error: this$static.charBuffer is null
from /Users/bsiggelkow/.rvm/gems/ruby-1.8.7-p299/gems/envjs-0.3.7/lib/envjs/static.js:13258:in `$accumulateCharacters' [JavaScript]