Buildcraft Worldgen Layer

[adosikas]

Affected Mod Versions:

• Forge version: 14.23.5.2847
• RTG version: 6.1.0.0-snapshot.1
• Buildcraft version: 7.99.24.3
• A couple more mods which affect world generation (Full mod list below)

  [✔️] appliedenergistics2-rv6-beta-1
  [✔️] AutoRegLib-1.3-32
  [✔️] bettercaves-1.12.2-1.5.1
  [✔️] BiomesOPlenty-1.12.2-7.0.1.2441-universal
  [✔️] buildcraft-all-7.99.24.3
  [✔️] chiselsandbits-14.33
  [✔️] Farseek-1.12-2.4
  [✔️] Geolosys-1.12.2-3.0.10
  [✔️] ImmersiveEngineering-0.12-92
  [✔️] InventoryTweaks-1.63
  [✔️] jei_1.12.2-4.15.0.292
  [✔️] jeiintegration_1.12.2-1.5.1.36
  [✔️] journeymap-1.12.2-5.5.5
  [📁] memory_repo (folder)
  [✔️] OceanFloor-1.12.2-1.0.2
  [✔️] Quark-r1.6-177
  [✔️] QuickLeafDecay-MC1.12.1-1.2.4
  [📁] railcraft (folder)
  [✔️] railcraft-12.0.0
  [✔️] RTG-1.12.2-6.1.0.0-snapshot.1
  [✔️] Streams-1.12-0.4.7
  [✔️] theoneprobe-1.12-1.4.28
  [✔️] UndergroundBiomesConstructs-1.12-1.3.7

Issue Description:

Biomes are infrequently broken up by patches of stone which have the river biome and are roughly river-shaped.
Deserts make this very visible:

The log contains the following:

[Client thread/ERROR] [RTG]: Failed to remove the vanilla river layer; Wrong GenLayer type: buildcraft.energy.generation.GenLayerAddOilDesert

Maybe related to the same problem as #1285?