76.438 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "AbandonedRuins_updated_fork/lua/events.lua:6: AbandonedRuins_updated_fork/lua/spawning.lua:74: syntax error near '+'
stack traceback:
[C]: in function 'require'
AbandonedRuins_updated_fork/lua/events.lua:6: in main chunk
[C]: in function 'require'
AbandonedRuins_updated_fork/control.lua:2: in main chunk"
76.438 Info ServerMultiplayerManager.cpp:808: updateTick(18446744073709551615) changing state from(CreatingGame) to(InitializationFailed)
83.705 Info ServerMultiplayerManager.cpp:146: Quitting multiplayer connection.
83.705 Info ServerMultiplayerManager.cpp:808: updateTick(18446744073709551615) changing state from(InitializationFailed) to(Closed)
83.705 Info ServerMultiplayerManager.cpp:166: Deleting active scenario (global = true).
83.705 Info UDPSocket.cpp:238: Closing socket

96.659 Checksum for script level/control.lua: 3792629764
96.661 Checksum for script aai-loaders/control.lua: 600900283
96.663 Checksum for script aai-signal-transmission/control.lua: 452882495
96.664 Checksum for script aai-vehicles-ironclad/control.lua: 1453979885
97.230 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "AbandonedRuins_updated_fork/lua/events.lua:6: AbandonedRuins_updated_fork/lua/spawning.lua:74: syntax error near '+'
stack traceback:
[C]: in function 'require'
AbandonedRuins_updated_fork/lua/events.lua:6: in main chunk
[C]: in function 'require'
AbandonedRuins_updated_fork/control.lua:2: in main chunk"
97.230 Info ServerMultiplayerManager.cpp:808: updateTick(18446744073709551615) changing state from(CreatingGame) to(InitializationFailed)
104.288 Info ServerMultiplayerManager.cpp:146: Quitting multiplayer connection.
104.288 Info ServerMultiplayerManager.cpp:808: updateTick(18446744073709551615) changing state from(InitializationFailed) to(Closed)
104.288 Info ServerMultiplayerManager.cpp:166: Deleting active scenario (global = true).
104.288 Info UDPSocket.cpp:238: Closing socket
105.106 Script @space-exploration/scripts/migrate.lua:278: space-exploration: Starting migrations from 0.7.19 to 0.7.56 (simulation)

It doesn't seem to like the short version foo += 1. I had to fix it on several places. 1.5.1 will be up soon.

Seems like Lua is a single-pass "compiler" (more interpreter): https://stackoverflow.com/questions/20091779/lua-operators-why-isnt-and-so-on-defined

Still have some errors here. storage.allowed_planets didn't properly initialize. Maybe I have compare it with nil and not check with not? Lua is try-n-fail here.