deps: patch V8 to 6.4.388.44

PR-URL: https://github.com/nodejs/node/pull/18687
Refs: https://github.com/v8/v8/compare/6.4.388.42...6.4.388.44
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

2 files changed, 31 insertions, 0 deletions

diff --git a/deps/v8/test/cctest/test-heap-profiler.cc b/deps/v8/test/cctest/test-heap-profiler.cc
index a0796ccd56..5a94708ba8 100644
--- a/deps/v8/test/cctest/test-heap-profiler.cc
+++ b/deps/v8/test/cctest/test-heap-profiler.cc
@@ -3184,3 +3184,14 @@ TEST(SamplingHeapProfilerSampleDuringDeopt) {
   CHECK(profile);
   heap_profiler->StopSamplingHeapProfiler();
 }
+
+TEST(HeapSnapshotPrototypeNotJSReceiver) {
+  LocalContext env;
+  v8::HandleScope scope(env->GetIsolate());
+  v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
+  CompileRun(
+      "function object() {}"
+      "object.prototype = 42;");
+  const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
+  CHECK(ValidateSnapshot(snapshot));
+}
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-806388.js b/deps/v8/test/mjsunit/regress/regress-crbug-806388.js
new file mode 100644
index 0000000000..b55b50107e
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-806388.js
@@ -0,0 +1,20 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --enable-slow-asserts --expose-gc
+
+class Derived extends Array {
+    constructor(a) {
+      // Syntax Error.
+      const a = 1;
+    }
+}
+
+// Derived is not a subclass of RegExp
+let o = Reflect.construct(RegExp, [], Derived);
+o.lastIndex = 0x1234;
+%HeapObjectVerify(o);
+
+gc();
+%HeapObjectVerify(o);