Handle exceptions thrown from bindings as a convertible InvocationTargetException.

For example, if IncompleteRegionException is thrown by a binding, it
will result in a InvocationTargetException now with a getCause(),
which gets handled as if that exception was thrown from the actual
Method that is invoked for the command.

src/main/java/com/sk89q/worldedit/util/command/parametric/Binding.java

@@ -23,6 +23,7 @@ import com.sk89q.minecraft.util.commands.CommandException;
 import com.sk89q.worldedit.util.command.binding.PrimitiveBindings;
 import com.sk89q.worldedit.util.command.binding.StandardBindings;
 
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Type;
 import java.util.List;
 
@@ -78,7 +79,7 @@ public interface Binding {
      * @throws CommandException on a command exception
      */
     Object bind(ParameterData parameter, ArgumentStack scoped, boolean onlyConsume)
-            throws ParameterException, CommandException;
+            throws ParameterException, CommandException, InvocationTargetException;
 
     /**
      * Get a list of suggestions for the given parameter and user arguments.

src/main/java/com/sk89q/worldedit/util/command/parametric/BindingHelper.java

@@ -143,7 +143,7 @@ public class BindingHelper implements Binding {
 
     @Override
     public Object bind(ParameterData parameter, ArgumentStack scoped,
-            boolean onlyConsume) throws ParameterException, CommandException {
+            boolean onlyConsume) throws ParameterException, CommandException, InvocationTargetException {
         BoundMethod binding = match(parameter);
         List<Object> args = new ArrayList<Object>();
         args.add(scoped);
@@ -178,7 +178,7 @@ public class BindingHelper implements Binding {
             } else if (e.getCause() instanceof CommandException) {
                 throw (CommandException) e.getCause();
             }
-            throw new RuntimeException(e.getCause());
+            throw e;
         }
     }
 

src/main/java/com/sk89q/worldedit/util/command/parametric/ParametricCallable.java

@@ -367,7 +367,7 @@ class ParametricCallable implements CommandCallable {
      * @throws CommandException on an error
      */
     private Object getDefaultValue(int i, ContextArgumentStack scoped)
-            throws ParameterException, CommandException {
+            throws ParameterException, CommandException, InvocationTargetException {
         CommandContext context = scoped.getContext();
         ParameterData parameter = parameters[i];