a.diff

diff --git a/core/src/main/java/org/jruby/runtime/InterpretedIRBlockBody.java b/core/src/main/java/org/jruby/runtime/InterpretedIRBlockBody.java
index 8a3a8fa..57558db 100644
--- a/core/src/main/java/org/jruby/runtime/InterpretedIRBlockBody.java
+++ b/core/src/main/java/org/jruby/runtime/InterpretedIRBlockBody.java
@@ -1,6 +1,7 @@
 package org.jruby.runtime;
 
 import org.jruby.EvalType;
+import org.jruby.RubyHash;
 import org.jruby.ir.IRClosure;
 import org.jruby.ir.IRFlags;
 import org.jruby.ir.interpreter.Interpreter;
@@ -70,6 +71,16 @@ public class InterpretedIRBlockBody extends IRBlockBody {
         }
         this.evalType.set(EvalType.NONE);
 
+        if (ic.receivesKeywordArguments()) {
+            RubyHash kwargs = IRRuntimeHelpers.extractKwargsHash(args, signature.required(), true);
+
+            if (kwargs != null) {
+                kwargs = (RubyHash) kwargs.dup(context);
+                kwargs.setFrozen(false);
+                args[args.length - 1] = kwargs;
+            }
+        }
+
         try {
             return Interpreter.INTERPRET_BLOCK(context, self, ic, args, binding.getMethod(), block, type);
         }