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Very interesting. Would it be possible to raise an error in this rather rare case? Although I imagine it would be hard to implement the checks in the compiler, I would consider continue worth the added complexity. For the record, I've found the 5.1 scope rule change handy in the past ;).

- Alex

----- Original Message ----- From: "Roberto Ierusalimschy" <>
To: "Lua list" <>
Sent: Monday, February 25, 2008 9:28 PM
Subject: Re: upcoming changes in Lua 5.2 [was Re: Location of a package]

Now, consider the addition of 'continue':

   if something then continue end
   local x = ...
 until something-with-x

We have two options: either the continue jumps into the scope of 'x'
bypassing its declaration/initialization (very bad), or the continue
skips the test altogether (very bad too).

So, it seems that continue is incompatible with this scope rule...

-- Roberto