Index: src/CodeGen/CodeGenerator.cc
===================================================================
--- src/CodeGen/CodeGenerator.cc	(revision f326f991b29be15df1c48ee29bf3e49f7a7ba81a)
+++ src/CodeGen/CodeGenerator.cc	(revision 70a06f62e367e9c06390ae334378318747bac089)
@@ -10,5 +10,5 @@
 // Created On       : Mon May 18 07:44:20 2015
 // Last Modified By : Rob Schluntz
-// Last Modified On : Mon Apr 11 15:30:52 2016
+// Last Modified On : Thu Apr 14 15:40:00 2016
 // Update Count     : 255
 //
@@ -485,5 +485,5 @@
 
 	void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
-		assert( false );
+		assert( false && "UntypedOffsetofExpr should not reach code generation" );
 	}
 
@@ -494,4 +494,8 @@
 		output << ", " << mangleName( offsetofExpr->get_member() );
 		output << ")";
+	}
+
+	void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
+		assert( false && "OffsetPackExpr should not reach code generation" );
 	}
 
Index: src/CodeGen/CodeGenerator.h
===================================================================
--- src/CodeGen/CodeGenerator.h	(revision f326f991b29be15df1c48ee29bf3e49f7a7ba81a)
+++ src/CodeGen/CodeGenerator.h	(revision 70a06f62e367e9c06390ae334378318747bac089)
@@ -65,4 +65,5 @@
 		virtual void visit( UntypedOffsetofExpr *offsetofExpr );
 		virtual void visit( OffsetofExpr *offsetofExpr );
+		virtual void visit( OffsetPackExpr *offsetPackExpr );
 		virtual void visit( LogicalExpr *logicalExpr );
 		virtual void visit( ConditionalExpr *conditionalExpr );