diff -r 2b8512340180 -r bbb498ccb4ac src/compiler/AST.h
--- a/src/compiler/AST.h	Sat Dec 22 19:48:43 2012 -0800
+++ b/src/compiler/AST.h	Sat Dec 22 23:18:57 2012 -0800
@@ -883,10 +883,12 @@
     struct Entry {
         ScopedRoot<String> name;
         Expression *expr;
+        SourcePosition pos;
 
-        Entry(Handle<String> name, Expression *expr)
+        Entry(Handle<String> name, Expression *expr, const SourcePosition &pos)
           : name(name),
-            expr(expr)
+            expr(expr),
+            pos(pos)
         {
         }
     };