Fix reobfuscate

src/minecraft/net/minecraft/src/Constants.java

@@ -26,12 +26,12 @@ public class Constants {
 		try {
 			for(Field f : cls.getDeclaredFields()) {
 //				unsafe.putBoolean(cls, unsafe.fieldOffset(f), Boolean.getBoolean(cls.getName() + "." + f.getName()));
-				f.setBoolean(null, Boolean.getBoolean(cls.getName() + "." + f.getName()));
+				f.setBoolean(null, Boolean.getBoolean("net.minecraft.src.Constants." + f.getName()));
 			}
 		} catch(Throwable t) {
 			throw new RuntimeException(t);
 		}
-		if(System.getProperty(cls.getName() + ".USE_64BIT_PERLIN_GENERATOR") != null) {
+		if(System.getProperty("net.minecraft.src.Constants.USE_64BIT_PERLIN_GENERATOR") != null) {
 			System.err.println("USE_64BIT_PERLIN_GENERATOR is deprecated and will remove in future, Please consider use -Dnet.minecraft.src.NoiseGeneratorOctaves.noiseType=" + (USE_64BIT_PERLIN_GENERATOR ? "long" : "int") + "Type");
 		}
 	}

src/minecraft/net/minecraft/src/NoiseGenerator.java

@@ -3,6 +3,8 @@ package net.minecraft.src;
 public abstract class NoiseGenerator
 {
 	public void populateNoiseArray(double[] par1ArrayOfDouble, double par2, double par4, double par6, int par8, int par9, int par10, double par11, double par13, double par15, double par17) {
-		
+		if (this instanceof NoiseGeneratorPerlin) {
+			((NoiseGeneratorPerlin) this).populateNoiseArray(par1ArrayOfDouble, par2, par4, par6, par8, par9, par10, par11, par13, par15, par17);
+		} else throw new Error("Fucked by MCP™");
 	}
 }