[1.205] grids failing to paste from blueprint, error during grid init/broken missing block handling

2024-10-16 03:55:16.626 - Thread:  12 ->  Initialized large grid H.A.C. - Charybdis-R (Battleship) 31995 PCU
2024-10-16 03:55:17.854 - Thread:   1 ->  No definition 'MyObjectBuilder_CubeBlock/LargeBlockConveyorPipeCorner'. Maybe a mistake in XML?
2024-10-16 03:55:17.854 - Thread:   1 ->  No definition 'MyObjectBuilder_CubeBlock/LargeBlockConveyorPipeCorner'. Maybe a mistake in XML?
2024-10-16 03:55:17.855 - Thread:   1 ->  No definition 'MyObjectBuilder_CubeBlock/LargeBlockConveyorPipeCorner'. Maybe a mistake in XML?
2024-10-16 03:55:17.856 - Thread:   1 ->  Error during grid init:System.InvalidOperationException: Instances of abstract classes cannot be created.
   at System.Runtime.CompilerServices.RuntimeHelpers._CompileMethod(IRuntimeMethodInfo method)
   at System.Reflection.Emit.DynamicMethod.CreateDelegate(Type delegateType, Object target)
   at System.Linq.Expressions.Compiler.LambdaCompiler.Compile(LambdaExpression lambda, DebugInfoGenerator debugInfoGenerator)
   at System.Linq.Expressions.Expression`1.Compile()
   at VRage.ObjectBuilders.MyObjectFactory`2.CreateInstance[TBase](MyObjectBuilderType objectBuilderType)
   at VRage.ObjectBuilders.MyObjectFactory`2.CreateObjectBuilder[TObjectBuilder](Type instanceType)
   at VRage.Game.MyDefinitionBase.GetObjectBuilder()
   at Sandbox.Game.Entities.Cube.MyGridClipboard.PasteGridInternal(Boolean deactivate, List`1 pastedBuilders, List`1 touchingGrids, UpdateAfterPasteCallback updateAfterPasteCallback, Boolean multiBlock, Boolean showWarning)
   at Sandbox.Game.Entities.Cube.MyGridClipboard.PasteGrid(Boolean deactivate, Boolean showWarning)

2024-10-16 04:28:58.784 - Thread: 11 -> Initialized large grid Erysikhton 158389 PCU
2024-10-16 04:28:58.941 - Thread: 11 -> Initialized large grid Proserpina II 10062 PCU
2024-10-16 04:29:04.371 - Thread: 1 -> No definition 'MyObjectBuilder_SmallMissileLauncherReload/LargeRailgun'. Maybe a mistake in XML?
2024-10-16 04:29:04.372 - Thread: 1 -> No definition 'MyObjectBuilder_SmallMissileLauncherReload/LargeRailgun'. Maybe a mistake in XML?
2024-10-16 04:29:04.374 - Thread: 1 -> No definition 'MyObjectBuilder_SmallMissileLauncherReload/LargeRailgun'. Maybe a mistake in XML?
2024-10-16 04:29:04.374 - Thread: 1 -> No definition 'MyObjectBuilder_SmallMissileLauncherReload/LargeRailgun'. Maybe a mistake in XML?
2024-10-16 04:29:04.381 - Thread: 1 -> No definition 'MyObjectBuilder_SmallMissileLauncherReload/LargeRailgun'. Maybe a mistake in XML?
2024-10-16 04:29:04.382 - Thread: 1 -> Error during grid init:System.InvalidOperationException: Instances of abstract classes cannot be created.
 at System.Runtime.CompilerServices.RuntimeHelpers._CompileMethod(IRuntimeMethodInfo method)
 at System.Reflection.Emit.DynamicMethod.CreateDelegate(Type delegateType, Object target)
 at System.Linq.Expressions.Compiler.LambdaCompiler.Compile(LambdaExpression lambda, DebugInfoGenerator debugInfoGenerator)
 at System.Linq.Expressions.Expression`1.Compile()
 at VRage.ObjectBuilders.MyObjectFactory`2.CreateInstance[TBase](MyObjectBuilderType objectBuilderType)
 at VRage.ObjectBuilders.MyObjectFactory`2.CreateObjectBuilder[TObjectBuilder](Type instanceType)
 at VRage.Game.MyDefinitionBase.GetObjectBuilder()
 at Sandbox.Game.Entities.Cube.MyGridClipboard.PasteGridInternal(Boolean deactivate, List`1 pastedBuilders, List`1 touchingGrids, UpdateAfterPasteCallback updateAfterPasteCallback, Boolean multiBlock, Boolean showWarning)
 at Sandbox.Game.Entities.Cube.MyGridClipboard.PasteGrid(Boolean deactivate, Boolean showWarning)

The above message gets printed to the log whenever attempting to paste in the affected grids. This does not happen in 204. In 205, grids with modded blocks saved to their .xml will load into the clipboard but fail to paste in, showing a "paste operation failed selected area is occupied" error - nothing's actually doing area checks, this error also shows up when the blueprint fails to load in another way.

This issue might be confused with certain mods being the trigger, but it seems to be a coincidence. For example, the "Erysikhton" grid will paste in in a fresh empty vanilla world, but if you add the mod "WeaponCore - 2.5" to it, it will no longer be able to. This is because WeaponCore changes the TypeId of a vanilla railgun from SmallMissileLauncher to a ConveyorSorter, which triggers this issue.

Reproduction steps:

- Download the FSDtest or Charybdis grid and put it in your blueprint folder

- start a fresh vanilla save

- attempt to paste them in

- observe game log