Fix behavior of throw on yield*.

test/mjsunit/harmony/generators-turbo.js

Index: test/mjsunit/harmony/generators-turbo.js
diff --git a/test/mjsunit/harmony/generators-turbo.js b/test/mjsunit/harmony/generators-turbo.js
index 23913e4229a227b58be0fd63d262413c33c7a53b..902812cb5daed770bba56632810c379e30c47ca2 100644
--- a/test/mjsunit/harmony/generators-turbo.js
+++ b/test/mjsunit/harmony/generators-turbo.js
@@ -653,3 +653,15 @@ function Throw(generator, ...args) {
   assertEquals({value: 42, done: false}, Next(g));
   assertEquals({value: 23, done: true}, Return(g, 23));
 }
+
+{
+  let iterable = {
+    [Symbol.iterator]() {
+      return { next() { return {} } };
+    }
+  };
+  let foo = function*() { yield* iterable };
+  g = foo();
+  g.next();
+  assertThrows(() => Throw(g), TypeError);
+}