From 59a27953be09cc239b23462aa683964c30d07d8b Mon Sep 17 00:00:00 2001
From: Nathan Adams <dinnerbone@dinnerbone.com>
Date: Mon, 6 Nov 2017 15:02:37 +0100
Subject: [PATCH] If a redirect returned nothing, return nothing.

---
 src/main/java/com/mojang/brigadier/CommandDispatcher.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/mojang/brigadier/CommandDispatcher.java b/src/main/java/com/mojang/brigadier/CommandDispatcher.java
index 6be44cf..efdd8db 100644
--- a/src/main/java/com/mojang/brigadier/CommandDispatcher.java
+++ b/src/main/java/com/mojang/brigadier/CommandDispatcher.java
@@ -88,7 +88,11 @@ public class CommandDispatcher<S> {
             if (child != null) {
                 if (!child.getNodes().isEmpty()) {
                     final RedirectModifier<S> modifier = Iterators.getLast(context.getNodes().keySet().iterator()).getRedirectModifier();
-                    for (final S source : modifier.apply(context.build())) {
+                    final Collection<S> results = modifier.apply(context.build());
+                    if (results.isEmpty()) {
+                        return 0;
+                    }
+                    for (final S source : results) {
                         contexts.add(child.copy().withSource(source));
                     }
                 }