"Prompt called when mid prompt" a lot

[aaron-em]

Saw it in the tour immediately after I (also) saw #47. Repro:

1. sudo npm install -g wat; HEAD when I did this was commit e0d96cc
2. wat js object defineproperty

Seems reliable.

Kind of a shame; this is a super neat project but apparently not all that usable yet. (Fair enough; it hasn't had a release.) If I can get a pointer to where to start looking for the bug, I might take the time to turn this into a PR with a fix; there's a lot of wat here and I don't really have time to dig into it from scratch.

[dthree]

Thanks. Yeah, haven't had a chance to finish yet. Will release at some point.