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> Hello! Is it intended that in stacktraces standard C functions are
> sometimes reported as `_G.function` and sometimes simply as
> `function`?

It is not *intended*, but it is known. The algorithm that searches for
a name is depth-first, and due to the random order of table traversals
sometimes it finds 'function' first, sometimes it finds '_G' (and then
'function' inside it) first. Is this a problem? It seems easy to fix...
(As performance is not a problem here, we can first search with a level
limit of 1, and then search again with a level limit of 2.)

-- Roberto