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Norman Ramsey wrote:
> /usr/local/bin/lua5.1: invalid key to 'next'
> [...]
> Here is a fragment of the source code:
>       assert(type(rset) == 'table')
>       for r in pairs(rset) do --- this is line 961
>         assert(papers[r][pnum], 'reviewed-by and papers are inconsistent')
> I don't see how this can possibly be wrong, but evidently the compiler
> sees something that I don't.  Can anyone suggest what I might do?

Compiler? Nope: the runtime.

Does 'rset' happen to be a weak table or is rset modified inside
the loop?