getObject on String should really just return the string

src/main/java/info/sigterm/deob/attributes/code/Instruction.java

@@ -36,6 +36,11 @@ public abstract class Instruction
 	{
 		return length;
 	}
+	
+	public String getDesc(Frame frame)
+	{
+		return null;
+	}
 
 	protected void addJump(int offset)
 	{

src/main/java/info/sigterm/deob/attributes/code/instructions/AAStore.java

@@ -20,7 +20,7 @@ public class AAStore extends Instruction
 	{
 		Stack stack = frame.getStack();
 		
-		ObjectInstance value = (ObjectInstance) stack.pop();
+		ObjectInstance value = (ObjectInstance) stack.pop(); // Strings are objects too, so this cast fails
 		int index = (int) stack.pop();
 		ArrayInstance array = (ArrayInstance) stack.pop();
 		

src/main/java/info/sigterm/deob/attributes/code/instructions/InvokeStatic.java

@@ -40,6 +40,13 @@ public class InvokeStatic extends Instruction
 		for (int i = count - 1; i >= 0; --i)
 			args[i] = e.getStack().pop();
 		
+		if (otherClass == null)
+		{
+			System.out.println("invokestatic for nonexistant class " + clazz.getName());
+			e.getStack().push(this, null);
+			return;
+		}
+		
 		info.sigterm.deob.Method meth = otherClass.findMethod(method.getNameAndType());
 		e.getPath().invoke(meth, args);
 	}

src/main/java/info/sigterm/deob/attributes/code/instructions/LDC_W.java

@@ -30,4 +30,14 @@ public class LDC_W extends Instruction
 		PoolEntry entry = thisClass.getPool().getEntry(index);
 		frame.getStack().push(this, entry.getObject());
 	}
+	
+	
+	@Override
+	public String getDesc(Frame frame)
+	{
+		ClassFile thisClass = this.getInstructions().getCode().getAttributes().getClassFile();
+		PoolEntry entry = thisClass.getPool().getEntry(index);
+		
+		return "ldc_w " + entry.getObject();
+	}
 }

src/main/java/info/sigterm/deob/execution/Frame.java

@@ -49,6 +49,10 @@ public class Frame
 			
 			Instruction i = ins.findInstruction(pc);
 			
+			String desc = i.getDesc(this);
+			if (desc != null)
+				System.out.println(desc);
+			
 			try
 			{
 				i.execute(this);

src/main/java/info/sigterm/deob/pool/String.java

@@ -21,6 +21,6 @@ public class String extends PoolEntry
 	@Override
 	public Object getObject()
 	{
-		return stringIndex;
+		return this.getPool().getEntry(stringIndex).getObject();
 	}
 }

src/main/java/info/sigterm/deob/pool/UTF8.java

@@ -42,6 +42,12 @@ public class UTF8 extends PoolEntry
 	}
 
 	public java.lang.String getValue()
+	{
+		return (java.lang.String) getObject();
+	}
+	
+	@Override
+	public Object getObject()
 	{
 		return sb.toString();
 	}