requested changes

Author: sovdeeth

src/main/java/ch/njol/skript/lang/parser/DefaultValueData.java

@@ -46,7 +46,7 @@ public <T> void addDefaultValue(Class<T> type, DefaultExpression<T> value) {
 	 * @return The default value for type, or null if none is set.   
 	 */
 	public <T> @Nullable DefaultExpression<T> getDefaultValue(Class<T> type) {
-		Deque<DefaultExpression<?>> stack =  defaults.get(type);
+		Deque<DefaultExpression<?>> stack = defaults.get(type);
 		if (stack == null || stack.isEmpty())
 			return null;
 		//noinspection unchecked
@@ -60,9 +60,12 @@ public <T> void addDefaultValue(Class<T> type, DefaultExpression<T> value) {
 	 * @param type Which class to remove the default value of.
 	 */
 	public void removeDefaultValue(Class<?> type) {
-		Deque<DefaultExpression<?>> stack =  defaults.get(type);
-		if (stack != null && !stack.isEmpty())
+		Deque<DefaultExpression<?>> stack = defaults.get(type);
+		if (stack != null && !stack.isEmpty()) {
 			stack.pop();
+		} else {
+			throw new IllegalStateException("No default value for " + type.getName() + " to remove. Imbalanced add/remove?");
+		}
 	}
 
 }

src/main/java/ch/njol/skript/test/runner/ExprDefaultNumberValue.java

@@ -1,6 +1,7 @@
 package ch.njol.skript.test.runner;
 
 import ch.njol.skript.Skript;
+import ch.njol.skript.doc.NoDoc;
 import ch.njol.skript.lang.Expression;
 import ch.njol.skript.lang.ExpressionType;
 import ch.njol.skript.lang.SkriptParser.ParseResult;
@@ -9,6 +10,7 @@
 import org.bukkit.event.Event;
 import org.jetbrains.annotations.Nullable;
 
+@NoDoc
 public class ExprDefaultNumberValue extends SimpleExpression<Number> {
 
 	static {