Poison .arguments and .caller for generator functions

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index d0c1a446a8beb9e80e5ddce6fab385d74468363c..d03f48228bb457a5818258c1183f516e08764e37 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1068,7 +1068,7 @@ BUILTIN(ArrayConcat) {
 
 
 // -----------------------------------------------------------------------------
-// Strict mode poison pills
+// Generator and strict mode poison pills
 
 
 BUILTIN(StrictModePoisonPill) {
@@ -1078,6 +1078,13 @@ BUILTIN(StrictModePoisonPill) {
 }
 
 
+BUILTIN(GeneratorPoisonPill) {
+  HandleScope scope(isolate);
+  return isolate->Throw(*isolate->factory()->NewTypeError(
+      "generator_poison_pill", HandleVector<Object>(NULL, 0)));
+}
+
+
 // -----------------------------------------------------------------------------
 //