Do not dereference handles during relocation.

src/optimizing-compiler-thread.cc

Index: src/optimizing-compiler-thread.cc
diff --git a/src/optimizing-compiler-thread.cc b/src/optimizing-compiler-thread.cc
index b982b94198f617549d995699b8cd34169c95e490..1e2e0a85df11a195fdced7f8911d76055bc4d708 100644
--- a/src/optimizing-compiler-thread.cc
+++ b/src/optimizing-compiler-thread.cc
@@ -88,7 +88,9 @@ void OptimizingCompilerThread::CompileNext() {
   // The function may have already been optimized by OSR.  Simply continue.
   // Mark it for installing before queuing so that we can be sure of the write
   // order: marking first and (after being queued) installing code second.
-  optimizing_compiler->info()->closure()->MarkForInstallingRecompiledCode();
+  { Heap::RelocationLock relocation_lock(isolate_->heap());
+    optimizing_compiler->info()->closure()->MarkForInstallingRecompiledCode();
+  }
   output_queue_.Enqueue(optimizing_compiler);
 }