Async fs calls early in a scope search() handler crash the scope and/or Unity

While developing a JS scope, I made an async node fs.readdir call early on in my search() handler. This, basically, causes my scope to crash, and sometimes takes down all of Unity with it. It seems that being asynchronous here before returning a SearchQuery really isn't liked by the JS scopes stuff. I eventually worked around this by doing fs.readdirSync and feeling guilty about it, but there is some sort of error with the thread of control there, I think.