Using file metatable, cause segfault

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

batrick@menzoberranzan:~$ lua
Lua 5.1.3  Copyright (C) 1994-2008 Lua.org, PUC-Rio
> mt = getmetatable(io.stdin)
> p = newproxy()
> debug.setmetatable(p, mt)
> p:read()
Segmentation fault (core dumped)

I don't really feel it's a bug as someone with access to the debug
interface should be responsible and not do things this stupid, but I
thought I'd throw this out there...

-- 
-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