Parse arrow functions at proper precedence level

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 9cce681ad4ac79119ec701907df4813d156b3d60..50f27bdd227d0a01b22c56e42553cf11b2346a16 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -332,7 +332,12 @@ void BytecodeGenerator::VisitCompareOperation(CompareOperation* node) {
 }
 
 
-void BytecodeGenerator::VisitSpread(Spread* node) { UNIMPLEMENTED(); }
+void BytecodeGenerator::VisitSpread(Spread* node) { UNREACHABLE(); }
+
+
+void BytecodeGenerator::VisitEmptyParentheses(EmptyParentheses* node) {
+  UNREACHABLE();
+}
 
 
 void BytecodeGenerator::VisitThisFunction(ThisFunction* node) {