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Roberto Ierusalimschy wrote:

In the second picture, it may really be a small bug. When the table
has no hash elements, t->node points to 'dummynode' but t->lastfree
also points to dummynode (because size is 0). Then the decrement in the
marked line [while (t->lastfree-- > t->node) {] will make t->lastfree
point to outside the dummynode_ "array".

Funny, I'm in the process of going through that code right now
in an effort to play around a bit with putting some of the Lua
libraries into ROM.

I guess one way to fix this is to have two dummynode entries in an
array and point t->node at the first one and t->lasfree point
at the second one...