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I am updating my mod 2.1 and I'm running into an issue where placing a blueprint for an enemy faction causes a crash when the blueprint contains an enemy spawner. This worked fine in version 2.0


I have attached a minimal mod to reproduce this error. All it does it attempt to build a blueprint containing an enemy spawner when a chunk is generated, as well as provide a spawner that can be blueprinted. If I load this sample mod in 2.0 it also works.

semi-related, but in both versions viewing the blueprint causes a game to crash, but before it was useable if you did't open it.
placing the blueprint manually with the player does seem to work, but the item_stack.build_blueprint call causes the crash.

Thanks for the report. Issue is now fixed for 2.1.15, however i am not admitting that enemy spawners in blueprint are supported - with this fix i also had to fix a desync related to enemy spawner variation when in a blueprint which indicates that spawners in blueprint are absolutely dry of tests.