CatServer/patches/net/minecraft/server/gui/MinecraftServerGui.java.patch

--- ../src-base/minecraft/net/minecraft/server/gui/MinecraftServerGui.java
+++ ../src-work/minecraft/net/minecraft/server/gui/MinecraftServerGui.java
@@ -77,6 +77,7 @@
                 System.exit(0);
             }
         });
+        minecraftservergui.latch.countDown();
     }
 
     public MinecraftServerGui(DedicatedServer serverIn)
@@ -161,8 +162,13 @@
         return jpanel;
     }
 
+    private java.util.concurrent.CountDownLatch latch = new java.util.concurrent.CountDownLatch(1);
     public void appendLine(final JTextArea textArea, final JScrollPane scrollPane, final String line)
     {
+        try
+        {
+            latch.await();
+        } catch (InterruptedException e){} //Prevent logging until after constructor has ended.
         if (!SwingUtilities.isEventDispatchThread())
         {
             SwingUtilities.invokeLater(new Runnable()