Add a unit test for Issue 711703

third_party/WebKit/Source/bindings/core/v8/ScriptStreamerTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bindings/core/v8/ScriptStreamer.h"
 
 #include <memory>
 
 #include "bindings/core/v8/ScriptSourceCode.h"
 #include "bindings/core/v8/ScriptStreamerThread.h"
@@ skipping 399 matching lines @@
   EXPECT_TRUE(source_code.Streamer());
   v8::TryCatch try_catch(scope.GetIsolate());
   v8::Local<v8::Script> script;
   EXPECT_TRUE(V8ScriptRunner::CompileScript(source_code, scope.GetIsolate(),
                                             kSharableCrossOrigin,
                                             kV8CacheOptionsDefault)
                   .ToLocal(&script));
   EXPECT_FALSE(try_catch.HasCaught());
 }
 
+// A test for crbug.com/711703. Should not crash.
+TEST_F(ScriptStreamingTest, GarbageCollectDuringStreaming) {
+  V8TestingScope scope;
+  ScriptStreamer::StartStreaming(
+      GetPendingScript(), ScriptStreamer::kParsingBlocking, settings_.get(),
+      scope.GetScriptState(), loading_task_runner_);
+
+  TestPendingScriptClient* client = new TestPendingScriptClient;
+  GetPendingScript()->WatchForLoad(client);
+  EXPECT_FALSE(client->Finished());
+
+  pending_script_ = nullptr;
+  ThreadState::Current()->CollectGarbage(BlinkGC::kNoHeapPointersOnStack,
+                                         BlinkGC::kGCWithSweep,
+                                         BlinkGC::kForcedGC);
+}
+
 }  // namespace
 
 }  // namespace blink