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Game crashed when I was trying to fill turret with magazines while bitters were killing the turrets. I had the UI with turret open to put in some bullets when error message was shown.
Message shown : Invalid ItemStackTargetSpecification::Source when guiTarget is zero.
Can't find any other error log with more detailed information in game folder, so hope this info is enough.

Thanks for the report we will check it out and fix it for 0.9

Hello, the cause of the bug has been resolved for 0.9, thanks for the report again.