NRE if try to get recipe crafted in hatchery from Angel`s mods,

Error while running event crafting_combinator::on_tick (ID 0)
Unknown virtual-signal name: puffer-egg-1
stack traceback:
crafting_combinator/script/rc.lua:157: in function 'find_recipe'
crafting_combinator/script/rc.lua:123: in function 'update'
crafting_combinator/control.lua:104: in function 'run_update'
crafting_combinator/control.lua:115: in function <crafting_combinator/control.lua:106>
stack traceback:
[C]: in function 'newindex'
__crafting_combinator/script/rc.lua:157: in function 'find_recipe'
crafting_combinator/script/rc.lua:123: in function 'update'
crafting_combinator/control.lua:104: in function 'run_update'
crafting_combinator/control.lua:115: in function <crafting_combinator/control.lua:106>

Do you have a save that can reproduce this? I tried and didn't crash, tho it didn't read the recipe either, which it probably should, but that's a much less of a severe problem...

Here is a blueprint that crashes, just connect the things

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

It crashes in new fresh game too.

Hmm, what mods do you use exactly?

Actually, if you could just make an empty save and send that to me so I can just sync with that, that would be great ;)

Never mind, managed to get it to crash after a bit of fiddling

Ok, found the issue. It's because Factorio considers 'false' to be a boolean in some instances. No idea why... But this should be fixed in the next version.