[2.0.47] Error changing circuit network signal "MultiplayerManager failed: "Import from malformed""

[drhampust]

What did you do?
Updated a Circuit network signal from "Cargo Wagon" to "W"


What happened?
Immediate server Crash, only message in log:

322.984 Error MainLoop.cpp Exception at tick 12947478: Import from malformed

Full log attached bellow.


What did you expect to happen instead?
Signal gracefully changed, If a crash occurs as it did i also expect more information in logs.


Does it happen always, once, or sometimes?
Happens each time I change the signal, Only happens on dedicated Headless Linux server, no issues in single player.
But if copying the blueprint on server and then change signal, crash ALWAYS occurs.


If you use the server world then the circuit network that causes the issues are located at the train stop labled as:

[item=copper-plate] Drop off

Left side of the rail at the unloading station. To initiate crash, change the Constant Combinater at the top left of the circuit build which holds the signal "Cargo Wagon" 8000, to "W" 8000, and the server should crash immediately and not save.

Cant provide a Minimal working setup.

[boskid]

128613

[drhampust]

Most Likely duplicate issue of one linked (128613)
I want to add that crash occurred even if constant combinator is not connected to any other part, and that it only occurred when changing into a signal from the "Signals" tab.