[es6] Spread in array literals

src/ast-numbering.cc

Index: src/ast-numbering.cc
diff --git a/src/ast-numbering.cc b/src/ast-numbering.cc
index d1b64bacb6f0d5848cb13a44149db892201405bf..13d8bf8a34f9f450a90a6a7ed02ea2c5aab7ef44 100644
--- a/src/ast-numbering.cc
+++ b/src/ast-numbering.cc
@@ -324,7 +324,11 @@ void AstNumberingVisitor::VisitCompareOperation(CompareOperation* node) {
 }
 
 
-void AstNumberingVisitor::VisitSpread(Spread* node) { UNREACHABLE(); }
+void AstNumberingVisitor::VisitSpread(Spread* node) {
+  IncrementNodeCount();
+  DisableOptimization(kSpread);
+  Visit(node->expression());
+}
 
 
 void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {