--- ../src-base/minecraft/net/minecraft/client/resources/AbstractResourcePack.java
+++ ../src-work/minecraft/net/minecraft/client/resources/AbstractResourcePack.java
@@ -58,7 +58,7 @@
 
     protected void func_110594_c(String p_110594_1_)
     {
-        field_110598_a.warn("ResourcePack: ignored non-lowercase namespace: %s in %s", new Object[] {p_110594_1_, this.field_110597_b});
+        field_110598_a.warn("ResourcePack: ignored non-lowercase namespace: {} in {}", new Object[] {p_110594_1_, this.field_110597_b});
     }
 
     public IMetadataSection func_135058_a(IMetadataSerializer p_135058_1_, String p_135058_2_) throws IOException

Fix broken log message in vanilla.
Fix broken log message in vanilla.
