Setup the pool pointer when entering Dart from C++ so the intrinsic functions may rely on it being …

runtime/vm/dart_api_impl_test.cc

Index: runtime/vm/dart_api_impl_test.cc
diff --git a/runtime/vm/dart_api_impl_test.cc b/runtime/vm/dart_api_impl_test.cc
index c3bc011e5e591878794e6b62927f591a571ece53..a88df073746c0b48fb32ffa2715d5f4f27e78bc1 100644
--- a/runtime/vm/dart_api_impl_test.cc
+++ b/runtime/vm/dart_api_impl_test.cc
@@ -230,6 +230,11 @@ TEST_CASE(ObjectEquals) {
   // Different objects.
   EXPECT_VALID(Dart_ObjectEquals(five, seven, &equal));
   EXPECT(!equal);
+
+  // Case where identity is not equality.
+  Dart_Handle nan = Dart_NewDouble(NAN);
+  EXPECT_VALID(Dart_ObjectEquals(nan, nan, &equal));
+  EXPECT(!equal);
 }