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On Tue, Jun 14, 2011 at 04:43:26PM +0200, Patrick Rapin wrote:
> Now `string` seems to have a metatable, but which doesn't support
> indexing of unknown metamethods.
The metatable of `string` is itself.  It has a method __index.
You can override __index if you don't like what it does.  E.g.:

> string.__index = rawindex
> return getmetatable(string).__call

So it seems to be a feature, not a bug. :-)