fix serverside crash

Author: FalsePattern

src/main/java/com/falsepattern/falsetweaks/FalseTweaks.java

@@ -24,11 +24,7 @@
 package com.falsepattern.falsetweaks;
 
 import com.falsepattern.falsetweaks.proxy.CommonProxy;
-import lombok.val;
 
-import net.minecraft.client.gui.FontRenderer;
-import net.minecraft.client.gui.GuiErrorScreen;
-import cpw.mods.fml.client.CustomModLoadingErrorDisplayException;
 import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.Mod;
 import cpw.mods.fml.common.SidedProxy;
@@ -37,6 +33,7 @@
 import cpw.mods.fml.common.event.FMLLoadCompleteEvent;
 import cpw.mods.fml.common.event.FMLPostInitializationEvent;
 import cpw.mods.fml.common.event.FMLPreInitializationEvent;
+import cpw.mods.fml.relauncher.FMLLaunchHandler;
 
 @Mod(modid = Tags.MOD_ID,
      version = Tags.MOD_VERSION,
@@ -61,21 +58,21 @@ public void construct(FMLConstructionEvent e) {
         proxy.construct(e);
     }
 
-    private static CustomModLoadingErrorDisplayException builtinMod(String modname) {
-        return new MultiLineLoadingException("Remove " + modname + " from your mods directory.\nIt has been merged into FalseTweaks!");
+    private static void builtinMod(String modname) {
+        createSidedException("Remove " + modname + " from your mods directory.\nIt has been merged into FalseTweaks!");
     }
 
     @Mod.EventHandler
     public void preInit(FMLPreInitializationEvent e) {
         proxy.preInit(e);
         if (Loader.isModLoaded("animfix")) {
-            throw builtinMod("animfix");
+            builtinMod("animfix");
         }
         if (Loader.isModLoaded("triangulator")) {
-            throw builtinMod("triangulator");
+            builtinMod("triangulator");
         }
         if (Loader.isModLoaded("DynamicLights")) {
-            throw new MultiLineLoadingException("Remove the DynamicLights mod and restart the game!\nFalseTweaks has built-in dynamic lights support.");
+            createSidedException("Remove the DynamicLights mod and restart the game!\nFalseTweaks has built-in dynamic lights support.");
         }
     }
 
@@ -94,25 +91,17 @@ public void loadComplete(FMLLoadCompleteEvent e) {
         proxy.loadComplete(e);
     }
 
-    private static class MultiLineLoadingException extends CustomModLoadingErrorDisplayException {
-        private final String[] lines;
-        public MultiLineLoadingException(String text) {
-            lines = text.split("\n");
-        }
-
-        @Override
-        public void initGui(GuiErrorScreen errorScreen, FontRenderer fontRenderer) {
-
+    private static void createSidedException(String text) {
+        if (FMLLaunchHandler.side().isClient()) {
+            throw ClientHelper.createException(text);
+        } else {
+            throw new Error(text);
         }
+    }
 
-        @Override
-        public void drawScreen(GuiErrorScreen errorScreen, FontRenderer fontRenderer, int mouseRelX, int mouseRelY, float tickTime) {
-            int offset = errorScreen.height / 2 - (lines.length * 5);
-            int x = errorScreen.width / 2;
-            for (val line: lines) {
-                errorScreen.drawCenteredString(fontRenderer, line, x, offset, 0xFFFFFF);
-                offset += 10;
-            }
+    private static class ClientHelper {
+        private static RuntimeException createException(String text) {
+            return new MultiLineLoadingException(text);
         }
     }
 }

src/main/java/com/falsepattern/falsetweaks/MultiLineLoadingException.java

@@ -0,0 +1,33 @@
+package com.falsepattern.falsetweaks;
+
+import lombok.val;
+
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.GuiErrorScreen;
+import cpw.mods.fml.client.CustomModLoadingErrorDisplayException;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+
+@SideOnly(Side.CLIENT)
+class MultiLineLoadingException extends CustomModLoadingErrorDisplayException {
+    private final String[] lines;
+
+    public MultiLineLoadingException(String text) {
+        lines = text.split("\n");
+    }
+
+    @Override
+    public void initGui(GuiErrorScreen errorScreen, FontRenderer fontRenderer) {
+
+    }
+
+    @Override
+    public void drawScreen(GuiErrorScreen errorScreen, FontRenderer fontRenderer, int mouseRelX, int mouseRelY, float tickTime) {
+        int offset = errorScreen.height / 2 - (lines.length * 5);
+        int x = errorScreen.width / 2;
+        for (val line : lines) {
+            errorScreen.drawCenteredString(fontRenderer, line, x, offset, 0xFFFFFF);
+            offset += 10;
+        }
+    }
+}