From f34c89f91425c65d574841a5b0c2f644551a08cd Mon Sep 17 00:00:00 2001
From: Ellpeck <me@ellpeck.de>
Date: Tue, 26 Sep 2023 10:21:56 +0200
Subject: [PATCH] fixed a rare exception when modules calculate incorrect next
 nodes closes #187

---
 src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java b/src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java
index eac2c1b..8a741a4 100644
--- a/src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java
+++ b/src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java
@@ -379,7 +379,7 @@ public class PipeBlockEntity extends BlockEntity implements MenuProvider, IPipeC
     public int getNextNode(List<BlockPos> nodes, int index) {
         return this.streamModules()
                 .map(m -> m.getRight().getCustomNextNode(m.getLeft(), this, nodes, index))
-                .filter(Objects::nonNull).findFirst().orElse(index);
+                .filter(m -> m != null && m >= 0).findFirst().orElse(index);
     }
 
     public List<ItemFilter> getFilters() {