bad error message for error() when called with thread

["Patrick Donnelly" <batrick.donnelly@...>]

I believe this error message is incorrect:

> error(coroutine.create(function() end))
2
stack traceback:
>

I was expecting:

> error(coroutine.create(function() end))
(error object is not a string)
>

-- 
-Patrick Donnelly

"One of the lessons of history is that nothing is often a good thing
to do and always a clever thing to say."

-Will Durant