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* Roberto Ierusalimschy:

>> > The reference manual clearly states:
>> >
>> >> A label is visible in the entire block where it is defined (including 
>> >> nested blocks, but not nested functions). 
>> And I think this is a mistake, both in implementation and in
>> specification.
> What is the mistake? What change would you suggest?

Labels should have non-lexical scope, extending across the whole
function, and the same label must not be used twice within the same