Hey, somebody reported an error in conjunction with autobuild mod, which i maintain.

https://mods.factorio.com/mod/autobuild/discussion/660895d10b943cdf6758a1d5

I looks to me, that it doesn't handle a possible nil-access to the partner property of an entity under some conditions.

Hm. Ill need to check. There seem to be quite a few edge cases like that.
I plan on doing a ground up rebuild eventually so it should catch any other cases.

On second thought, do you call on_script_built when constructing entities? That might be the issue.

When constructing entities, I call this:

local items, entity, request_proxy = ghost.revive{
return_item_request_proxy = true,
raise_revive = true,
}

This triggers the script_raised_revive event

Fixed