From 8ee90a7338ad4527f0e0ea11c1283f4a3f4c5129 Mon Sep 17 00:00:00 2001
From: Glease <4586901+Glease@users.noreply.github.com>
Date: Fri, 9 Sep 2022 18:09:59 +0800
Subject: [PATCH] fix crash upon opening hologram gui

---
 .../structurelib/gui/GuiScreenConfigureChannels.java           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/gtnewhorizon/structurelib/gui/GuiScreenConfigureChannels.java b/src/main/java/com/gtnewhorizon/structurelib/gui/GuiScreenConfigureChannels.java
index e5a766bf..fed006d0 100644
--- a/src/main/java/com/gtnewhorizon/structurelib/gui/GuiScreenConfigureChannels.java
+++ b/src/main/java/com/gtnewhorizon/structurelib/gui/GuiScreenConfigureChannels.java
@@ -236,7 +236,8 @@ public class GuiScreenConfigureChannels extends GuiScreen implements IGuiScreen
     private void updateButtons() {
         // this will be called from setText of key and value. NEVER UPDATE THE VALUE OF THESE HERE OR GET A
         // STACKOVERFLOW!
-        boolean existing = ChannelDataAccessor.hasSubChannel(trigger, key.getText());
+        String keyText = key.getText();
+        boolean existing = !StringUtils.isEmpty(keyText) && ChannelDataAccessor.hasSubChannel(trigger, keyText);
         getButtonList().get(0).displayString = existing
                 ? I18n.format("item.structurelib.constructableTrigger.gui.set")
                 : I18n.format("item.structurelib.constructableTrigger.gui.add");